{"id":14809,"date":"2024-09-13T08:28:08","date_gmt":"2024-09-13T16:28:08","guid":{"rendered":"https:\/\/chansmachining.com\/ghidul-de-baza-pentru-cromare\/"},"modified":"2024-12-17T21:28:06","modified_gmt":"2024-12-18T05:28:06","slug":"ghidul-de-baza-pentru-cromare","status":"publish","type":"post","link":"https:\/\/chansmachining.com\/ro\/ghidul-de-baza-pentru-cromare\/","title":{"rendered":"Ghidul de baz\u0103 pentru cromare"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>Ce este placarea cu crom?<\/strong><\/h2>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-process-1024x683.jpg\" alt=\"\" class=\"wp-image-7787\" srcset=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-process-1024x683.jpg 1024w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-process-300x200.jpg 300w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-process-768x513.jpg 768w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-process-1536x1025.jpg 1536w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-process.jpg 1687w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"520\" src=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-products.jpg\" alt=\"\" class=\"wp-image-7788\" style=\"width:428px;height:auto\" srcset=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-products.jpg 800w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-products-300x195.jpg 300w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Chrome-plating-products-768x499.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<p>Cromarea, cunoscut\u0103 \u0219i sub denumirea de cromare, este un proces de cromare prin care un strat de crom este depus pe o baz\u0103 de metal sau de aliaj.<\/p>\n\n<p>Pe l\u00e2ng\u0103 \u00eembun\u0103t\u0103\u021birea aspectului estetic al componentelor prelucrate cu o suprafa\u021b\u0103 lucioas\u0103 \u0219i ca o oglind\u0103, aceast\u0103 tehnic\u0103 cre\u0219te semnificativ durabilitatea acestora.<\/p>\n\n<p>Cromarea \u00eembun\u0103t\u0103\u021be\u0219te duritatea \u0219i durabilitatea suprafe\u021bei. \u00cen plus, reduce coroziunea \u0219i este u\u0219or de cur\u0103\u021bat. Toate avantajele de mai sus fac ca acesta s\u0103 fie utilizat \u00een mai multe domenii \u00een scopuri estetice \u0219i mecanice.<\/p>\n\n<h2 class=\"wp-block-heading\"><strong>Materiale tipice pentru cromare<\/strong><\/h2>\n\n<h3 class=\"wp-block-heading\"><strong>Crom hexavalent<\/strong><\/h3>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"1024\" height=\"449\" src=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Hexavalent-Chromium-danger-1024x449-1.jpg\" alt=\"\" class=\"wp-image-7789\" style=\"width:450px\" srcset=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Hexavalent-Chromium-danger-1024x449-1.jpg 1024w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Hexavalent-Chromium-danger-1024x449-1-300x132.jpg 300w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/Hexavalent-Chromium-danger-1024x449-1-768x337.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n<p>Cromul hexavalent, unul dintre materialele comune de cromare, este derivat \u00een principal din acidul cromic (CrO3). C\u00e2nd este dizolvat \u00een ap\u0103, acidul cromic (CrO3) formeaz\u0103 H2CrO4 dup\u0103 ad\u0103ugarea acidului sulfuric (H2SO4).<\/p>\n\n<p>Este utilizat pe scar\u0103 larg\u0103 at\u00e2t \u00een cromarea decorativ\u0103, c\u00e2t \u0219i \u00een cromarea dur\u0103 datorit\u0103 coroziunii excelente, rezisten\u021bei la uzur\u0103 \u0219i durit\u0103\u021bii ridicate.<\/p>\n\n<p>Cu toate acestea, substan\u021ba este toxic\u0103, ceea ce prezint\u0103 riscuri pentru mediu \u0219i s\u0103n\u0103tate pentru persoanele din jurul zonei. Prin urmare, de\u0219eurile periculoase provenite de la b\u0103ile de crom hexavalent trebuie tratate \u00eenainte de eliminare.<\/p>\n\n<h3 class=\"wp-block-heading\"><strong>Crom trivalent<\/strong><\/h3>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"373\" height=\"135\" src=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/images.jpg\" alt=\"\" class=\"wp-image-7790\" srcset=\"https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/images.jpg 373w, https:\/\/chansmachining.com\/wp-content\/uploads\/2024\/11\/images-300x109.jpg 300w\" sizes=\"(max-width: 373px) 100vw, 373px\" \/><\/figure><\/div>\n<p>Cromarea trivalent\u0103 este produs\u0103 \u00een principal cu sulfat de crom sau clorur\u0103 de crom.<\/p>\n\n<p>Considerat ca o solu\u021bie de chimie ecologic\u0103 pentru cromul hexavalent, cromul trivalent este utilizat \u00een cromarea decorativ\u0103 \u0219i \u00een unele scopuri industriale.<\/p>\n\n<p>Este mai pu\u021bin toxic \u0219i mai ecologic \u00een compara\u021bie cu cromul hexavalent. Dar, ca orice alt\u0103 substan\u021b\u0103 chimic\u0103, utilizarea \u0219i eliminarea oric\u0103ror de\u0219euri care con\u021bin crom trivalent sunt, de asemenea, reglementate.<\/p>\n\n<h2 class=\"wp-block-heading\"><strong> Etapele crom\u0103rii<\/strong><\/h2>\n\n<p>Cromarea este o tehnic\u0103 de aplicare a unui strat de crom pe o pies\u0103 metalic\u0103 sau din plastic pentru a-i oferi un aspect mai bun \u0219i o durat\u0103 de via\u021b\u0103 mai lung\u0103. Procesul de electroplacare a cromului const\u0103 \u00een mai multe etape pentru a asigura un strat neted \u0219i durabil.<\/p>\n\n<h3 class=\"wp-block-heading\">1. Preg\u0103tirea suprafe\u021bei<\/h3>\n\n<p>Primul proces care trebuie efectuat este preg\u0103tirea suprafe\u021bei pentru a garanta lipirea corect\u0103 a stratului de crom. Aceasta implic\u0103:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong> Cur\u0103\u021bare \u0219i degresare: <\/strong>Utilizarea diferitelor procese de cur\u0103\u021bare, cum ar fi cur\u0103\u021barea emulsiei, cur\u0103\u021barea alcalin\u0103, cur\u0103\u021barea solventului pentru cur\u0103\u021barea suprafe\u021bei libere de toate tipurile de depuneri, cum ar fi murd\u0103ria, gr\u0103simea etc.  <\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Poluare:<\/strong> \u0218lefuirea sau lustruirea suprafe\u021bei la cea mai fin\u0103 posibilitate \u0219i reducerea ad\u00e2ncimii rugozit\u0103\u021bii la Rz 2-3 \u03bcm pentru a v\u0103 asigura c\u0103 stratul de crom se va lipi bine \u0219i va oferi suficient\u0103 protec\u021bie.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">2. Gravur\u0103<\/h3>\n\n<p>\u00cen cazul metalelor nemetalice, cum ar fi plasticul, suprafa\u021ba trebuie s\u0103 fie gravat\u0103 pentru a oferi o suprafa\u021b\u0103 aspr\u0103 pe care s\u0103 se lipeasc\u0103 urm\u0103toarele straturi de acoperire. \u00cen acest proces, piesele sunt scufundate \u00eentr-un fluid de gravare care poate fi acid clorhidric, fluorhidric sau sulfuric.  <\/p>\n\n<h3 class=\"wp-block-heading\"> 3. Neutralizarea<\/h3>\n\n<p>Dup\u0103 gravur\u0103, piesele sunt sp\u0103late \u0219i neutralizate pentru a elimina acizii reziduali pentru urm\u0103toarele procese. Acest lucru se realizeaz\u0103 \u00een mod normal cu ajutorul unei solu\u021bii de neutralizare.  <\/p>\n\n<h3 class=\"wp-block-heading\"> 4. Catalizarea \u0219i accelerarea<\/h3>\n\n<p>Cu toate acestea, pentru substraturile din plastic, este nevoie de un proces de catalizare \u0219i accelerare pentru a \u00eembun\u0103t\u0103\u021bi suprafa\u021ba pentru procesul de placare chimic\u0103. Aceasta implic\u0103 scufundarea pieselor \u00eentr-un lichid care con\u021bine un catalizator, cum ar fi clorura de paladiu.  <\/p>\n\n<h3 class=\"wp-block-heading\"> 5. Placare f\u0103r\u0103 electrozi<\/h3>\n\n<p>Exist\u0103 \u00eentotdeauna o etap\u0103 ini\u021bial\u0103 de placare electrolitic\u0103 f\u0103r\u0103 nichel sau cupru \u00eenainte de \u00eenceperea crom\u0103rii propriu-zise. Acest strat este utilizat ca baz\u0103 pentru urm\u0103torul proces de electroplacare care urmeaz\u0103 s\u0103 aib\u0103 loc.  <\/p>\n\n<h3 class=\"wp-block-heading\">6. Electroplacare<\/h3>\n\n<p>Nucleul procesului de cromare implic\u0103:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Imersiune \u00een baie electrolitic\u0103: <\/strong>Piesa este plasat\u0103 \u00een baia electrolitic\u0103 cu ioni de crom dizolva\u021bi \u00een ea.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Aplicarea curentului electric:<\/strong> Un curent electric este trecut prin baie \u0219i acest lucru face ca ionii de crom s\u0103 fie depu\u0219i pe suprafa\u021ba pieselor \u0219i acest lucru duce la un strat de crom solid.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Controlul temperaturii:<\/strong> Se face \u00een mod normal la temperaturi cuprinse \u00eentre 50-60\u00b0C, astfel \u00eenc\u00e2t s\u0103 permit\u0103 o bun\u0103 depunere a antigenului.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">7. Cl\u0103tire \u0219i lustruire<\/h3>\n\n<p>Dup\u0103 depunerea stratului de crom:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong> Cl\u0103tire: <\/strong> Piesele sunt apoi sp\u0103late, astfel \u00eenc\u00e2t s\u0103 se elimine substan\u021bele chimice care pot fi \u00eenc\u0103 prezente \u00een baia de placare.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Lustruire:<\/strong> Suprafa\u021ba placat\u0103 este \u0219lefuit\u0103 pentru a o netezi \u0219i a-i oferi str\u0103lucirea necesar\u0103. Acest lucru este mai tipic pentru cromarea decorativ\u0103.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">8. Inspec\u021bia \u0219i controlul calit\u0103\u021bii<\/h3>\n\n<p>\u00cen cele din urm\u0103, piesele sunt examinate pentru a verifica dac\u0103 cromarea este uniform\u0103 \u0219i dac\u0103 exist\u0103 defecte pe ea. Orice rafinare suplimentar\u0103 care poate fi necesar\u0103 se face aici, \u00een timp ce orice lustruire ulterioar\u0103 se face tot aici.<\/p>\n\n<h2 class=\"wp-block-heading\"><strong>Tipuri de placare cu crom<\/strong><\/h2>\n\n<h3 class=\"wp-block-heading\">Placare cu crom dur<\/h3>\n\n<p>Cromarea dur\u0103 este denumit\u0103 \u0219i crom industrial sau crom tehnic. Grosimea standard a cromului dur este \u00eentre 0,02 mm \u0219i 0,04 mm. Acesta este aplicat \u00een principal pentru caracteristicile de performan\u021b\u0103 pe care le ofer\u0103 \u00een majoritatea aplica\u021biilor.  <\/p>\n\n<p>Acest tip de placare se caracterizeaz\u0103 prin duritate ridicat\u0103, rezisten\u021b\u0103 la uzur\u0103 \u0219i coeficient sc\u0103zut de frecare. \u00cen acest proces, este utilizat \u00een principal pe piese de ma\u0219ini, cilindri hidraulici \u0219i piese auto pentru a le cre\u0219te durabilitatea \u0219i eficien\u021ba.<\/p>\n\n<p>Exist\u0103 o varia\u021bie a cromului dur. se nume\u0219te crom dens sub\u021bire. \u0219i ofer\u0103 durabilitate sporit\u0103 cu frecare redus\u0103 \u0219i rezisten\u021b\u0103 mai mare la coroziune, ideal pentru aplica\u021bii de precizie.<\/p>\n\n<p><strong>Caracteristici<\/strong>:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Duritate ridicat\u0103 (variind de la 750 la 1000 Hv).<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Rezisten\u021b\u0103 excelent\u0103 la uzur\u0103<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Coeficient de frecare sc\u0103zut<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Rezisten\u021b\u0103 bun\u0103 la coroziune<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>\u00cen mod normal, este mai mare de 20 micrometri.<\/li>\n<\/ul>\n\n<p><strong>Aplica\u021bii<\/strong>:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Cilindri hidraulici<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Tije de piston<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Utilaje industriale<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Piese auto<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\"><strong> Cromare decorativ\u0103<\/strong><\/h3>\n\n<p>Un alt tip de cromare este cromarea decorativ\u0103 sau denumit\u0103 \u00een mod obi\u0219nuit crom str\u0103lucitor sau crom show. Acesta este utilizat \u00een principal \u00een scopuri ornamentale. Ofer\u0103 o suprafa\u021b\u0103 neted\u0103 \u0219i un aspect metalic care face ca piesele placate s\u0103 aib\u0103 o suprafa\u021b\u0103 ca o oglind\u0103.<\/p>\n\n<p> Acest tip de cromare decorativ\u0103 are o grosime standard cuprins\u0103 \u00eentre 0,002 mm \u0219i 0,02 mm. Este mai sub\u021bire dec\u00e2t cromul dur \u0219i se aplic\u0103 \u00een mod normal \u00eempreun\u0103 cu alte straturi, cum ar fi nichelul, pentru a spori leg\u0103tura \u0219i protec\u021bia \u00eempotriva coroziunii.<\/p>\n\n<p><strong>Caracteristici<\/strong>:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Finisaj lucios, ca o oglind\u0103<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Strat sub\u021bire \uff08dimensiune mai mic\u0103 de un micrometru\uff09<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Acesta este de obicei utilizat \u00eempreun\u0103 cu straturile de nichel<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Rezisten\u021b\u0103 moderat\u0103 la coroziune<\/li>\n<\/ul>\n\n<p><strong>Aplica\u021bii<\/strong>:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Ornamente \u0219i accesorii auto<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Instala\u021bii de uz casnic<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Mobilier<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Electronice de consum<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\"><strong>Diferen\u021ba dintre cromul dur \u0219i cromul decorativ<\/strong><\/h2>\n\n<p>De\u0219i at\u00e2t procesele de crom dur, c\u00e2t \u0219i cele de crom decorativ utilizeaz\u0103 crom, cele dou\u0103 sunt diferite \u00een ceea ce prive\u0219te func\u021biile \u0219i propriet\u0103\u021bile lor.<\/p>\n\n<h3 class=\"wp-block-heading\"><strong>Hard Chrome Plating<\/strong><\/h3>\n\n<p>Cromul industrial sau cromarea dur\u0103 este utilizat\u0103 mai degrab\u0103 pentru caracteristicile de performan\u021b\u0103 ale piesei dec\u00e2t pentru aspect. Scopul s\u0103u este de a spori durata de via\u021b\u0103 a pieselor ma\u0219inii, precum \u0219i eficien\u021ba acestora.<\/p>\n\n<p>Unele dintre utiliz\u0103ri includ tije de cilindru hidraulic, inele de piston, matri\u021be, matri\u021be \u0219i alte piese mecanice care trebuie s\u0103 sufere o uzur\u0103 ridicat\u0103 \u0219i o frecare redus\u0103.<\/p>\n\n<p><strong>Caracteristici:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong> Grosime:<\/strong> Cromarea dur\u0103 este mult mai groas\u0103 dec\u00e2t cromul decorativ \u0219i este \u00een mod normal \u00eentre 0. 0002 \u0219i 0. 020 inci. Aceast\u0103 grosime este benefic\u0103 pentru a oferi o rezisten\u021b\u0103 \u00eembun\u0103t\u0103\u021bit\u0103 la uzur\u0103 \u0219i durabilitate a materialului.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong> Duritate: <\/strong>Este extrem de greu, variind \u00eentre 65 \u0219i 69 HRC, acest lucru \u00eel face potrivit pentru utilizare \u00een medii industriale dure.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Finisajul suprafe\u021bei:<\/strong> De\u0219i este metalic \u0219i str\u0103lucitor, cromul dur nu posed\u0103 un efect de nivelare; de fapt, tinde s\u0103 exagereze imperfec\u021biunile \u0219i asperit\u0103\u021bile suprafe\u021bei. Prin urmare, nu este utilizat pentru func\u021bii estetice.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\"><strong> Cromare decorativ\u0103<\/strong><\/h3>\n\n<p>Cromarea decorativ\u0103 este utilizat\u0103 \u00een principal pentru a \u00eenfrumuse\u021ba piesele, deoarece are o suprafa\u021b\u0103 lucioas\u0103. Ofer\u0103 o suprafa\u021b\u0103 neted\u0103, reflectorizant\u0103 \u0219i lucioas\u0103 care d\u0103 un aspect pl\u0103cut structurii.<\/p>\n\n<p>Acest tip de placare se aplic\u0103 \u00een mod normal pe garnituri auto, ustensile de uz casnic, feronerie, instrumente muzicale \u0219i alte produse de consum.<\/p>\n\n<p><strong>Caracteristici:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong> Grosime:<\/strong> Cromarea decorativ\u0103 este mai sub\u021bire dec\u00e2t cromarea dur\u0103 este mai groas\u0103, ar putea fi la fel de sub\u021bire ca milionime de inch. Acest strat sub\u021bire este suficient pentru a oferi o suprafa\u021b\u0103 str\u0103lucitoare \u0219i reflectorizant\u0103 f\u0103r\u0103 a cre\u0219te grosimea materialului.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong> Stratificare:<\/strong> Procesul include \u00een mod normal electroplacarea unui strat de nichel pe articol \u00eenainte de placarea cu stratul de crom. Stratul de nichel confer\u0103 aspectul de netezime, str\u0103lucire \u0219i protec\u021bie \u00eempotriva ruginii, \u00een timp ce cel mai mic strat de crom confer\u0103 o u\u0219oar\u0103 nuan\u021b\u0103 de albastru \u0219i protec\u021bie suplimentar\u0103 \u00eempotriva abraziunii \u0219i ruginii.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong> U\u0219or de cur\u0103\u021bat:<\/strong> Cromul utilizat \u00een produsele decorative este neted \u0219i u\u0219or de cur\u0103\u021bat \u0219i, prin urmare, ideal pentru uz casnic.<\/li>\n<\/ul>\n\n<figure class=\"wp-block-table aligncenter\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"3\"><strong> Tabel comparativ <\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Caracteristic\u0103<\/td><td>Placare cu crom dur<\/td><td>Placare decorativ\u0103 cu crom<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Utilizare primar\u0103<\/td><td>Aplica\u021bii industriale<\/td><td>\u00cembun\u0103t\u0103\u021birea estetic\u0103<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Grosime<\/td><td>0,0002 p\u00e2n\u0103 la 0,020 inci<\/td><td>Milionimi de inch<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Duritate<\/td><td>65 p\u00e2n\u0103 la 69 HRC<\/td><td>Nu este specificat<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Finisaj de suprafa\u021b\u0103<\/td><td>Accentueaz\u0103 defectele de suprafa\u021b\u0103<\/td><td>Neted \u0219i reflectorizant<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Stratificare<\/td><td>Un singur strat de crom<\/td><td>Strat de nichel urmat de crom sub\u021bire<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Aplica\u021bii<\/td><td>Tije hidraulice, inele de piston, matri\u021be<\/td><td>Ornamente auto, articole de uz casnic<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">U\u0219urin\u021ba de cur\u0103\u021bare<\/td><td>Nu este specificat<\/td><td>U\u0219or de cur\u0103\u021bat<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\"><strong>Cum se \u00eendep\u0103rteaz\u0103 placarea cu crom?<\/strong><\/h2>\n\n<p>Exist\u0103 3 moduri de a v\u0103 face s\u0103 \u0219ti\u021bi cum s\u0103 scoate\u021bi cromul<\/p>\n\n<h3 class=\"wp-block-heading\"><strong>Echipamente specializate<\/strong><\/h3>\n\n<p>\u00cen primul r\u00e2nd, utilizarea de echipamente specializate r\u0103m\u00e2ne cea mai costisitoare, dar eficient\u0103 metod\u0103. Alegerea acestei abord\u0103ri \u00eenseamn\u0103 angajarea unei persoane cu experien\u021b\u0103, specializat\u0103 \u00een decaparea crom\u0103rii.<\/p>\n\n<p><strong>Abrasive Blaster <\/strong><\/p>\n\n<p>Procesul de sablare abraziv\u0103 trebuie s\u0103 utilizeze aer de \u00eenalt\u0103 presiune pentru a propulsa materiale abrazive, inclusiv nisip, perle de sticl\u0103 sau granule de o\u021bel, c\u0103tre o suprafa\u021b\u0103. Aceast\u0103 tehnic\u0103 este aplicat\u0103 pentru a \u00eendep\u0103rta cromul sau alt tip de finisaj de pe piesele auto, l\u0103s\u00e2nd baza metalic\u0103 neatins\u0103. \u00cen ciuda acestui fapt, are unele pericole, cum ar fi inhalarea prafului, \u0219ansele de a v\u0103 r\u0103ni ochii \u0219i erup\u021biile cutanate.<\/p>\n\n<p><strong> Cur\u0103\u021b\u0103tor ultrasonic <\/strong><\/p>\n\n<p>O alt\u0103 metod\u0103 bazat\u0103 pe echipamente este utilizarea unui aparat de cur\u0103\u021bat cu ultrasunete, care este folosit mai ales pentru sp\u0103larea produselor delicate, cum ar fi piesele electronice sau bijuteriile. Acesta utilizeaz\u0103 unde sonore de \u00eenalt\u0103 frecven\u021b\u0103 pentru a cur\u0103\u021ba suprafa\u021ba prin \u00eendep\u0103rtarea murd\u0103riei \u0219i a altor pete.  <\/p>\n\n<p>\u00cen cazul cromului, particulele de crom vibreaz\u0103 energic, ceea ce le face s\u0103 se desprind\u0103 de metal. Aceast\u0103 metod\u0103 este u\u0219oar\u0103 \u0219i neintruziv\u0103. Din cauza dimensiunilor aparatului de cur\u0103\u021bat, acesta este cel mai bine utilizat pe obiecte mici.<\/p>\n\n<h3 class=\"wp-block-heading\"><strong>Utilizarea substan\u021belor chimice<\/strong><\/h3>\n\n<p>Produsele chimice sunt mai ieftine dec\u00e2t metodele mecanice de \u00eendep\u0103rtare a cromului, dar prezint\u0103 riscuri grave pentru s\u0103n\u0103tate. Prin urmare, este nevoie de echipament de protec\u021bie atunci c\u00e2nd le utiliza\u021bi.<\/p>\n\n<p>Acid clorhidric<\/p>\n\n<p>Aceast\u0103 substan\u021b\u0103 coroziv\u0103 este utilizat\u0103 \u0219i pentru \u00eendep\u0103rtarea ruginii \u0219i este denumit\u0103 \u00een mod obi\u0219nuit acid muriatic. Pentru a \u00eendep\u0103rta cromul, este suficient un lichid cu o concentra\u021bie de 30-40%. Piesele cromate trebuie \u00eenmuiate \u00een lichid \u00eentr-o crati\u021b\u0103 metalic\u0103 puternic\u0103 p\u00e2n\u0103 c\u00e2nd cromul se \u00eendep\u0103rteaz\u0103. Acest lichid este amestecat cu acid clorhidric \u0219i ap\u0103 \u00een propor\u021bie de 1\/3 acid la ap\u0103.<\/p>\n\n<p>Hidroxid de sodiu<\/p>\n\n<p>Denumit\u0103 \u0219i le\u0219ie sau sod\u0103 caustic\u0103, hidroxidul de sodiu este puternic pentru \u00eendep\u0103rtarea cromului, dar elibereaz\u0103 hidrogen gazos extrem de exploziv, dac\u0103 reac\u021bioneaz\u0103 cu aluminiul.  <\/p>\n\n<ol class=\"wp-block-list\" start=\"1\">\n<li>Se amestec\u0103 8 p\u00e2n\u0103 la 12 uncii fluide de le\u0219ie cu un galon de ap\u0103 \u00eentr-un recipient neutru.<\/li>\n<\/ol>\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u00cenmuia\u021bi articolul p\u00e2n\u0103 c\u00e2nd dispare cromul.<\/li>\n<\/ol>\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>Cl\u0103ti\u021bi \u0219i usca\u021bi.<\/li>\n<\/ol>\n\n<p>Electroplacare invers\u0103<\/p>\n\n<p>Procesul de galvanizare invers\u0103 se realizeaz\u0103 cu ajutorul acizilor sulfuric \u0219i cromic, care este periculos din cauza r\u0103nilor \u0219i a gazelor toxice. Acest proces ar trebui s\u0103 fie efectuat numai de cei care au cuno\u0219tin\u021be adecvate \u00een ceea ce prive\u0219te electricitatea \u0219i substan\u021bele chimice \u0219i se realizeaz\u0103 prin trecerea pieselor printr-un curent viu pentru a separa cromul.<\/p>\n\n<h3 class=\"wp-block-heading\"><strong>Produse de uz casnic de zi cu zi pentru cromare Diy<\/strong><\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong> Bicarbonat de sodiu:<\/strong> Un abraziv u\u0219or, bicarbonatul de sodiu poate fi folosit pentru a face o past\u0103 care poate fi folosit\u0103 pentru a \u00eendep\u0103rta straturile sub\u021biri de crom.<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Albitor:<\/strong> Ar putea fi posibil\u0103 \u00eendep\u0103rtarea straturilor mai sub\u021biri prin \u00eenmuierea articolului cromat \u00eentr-o solu\u021bie de \u00een\u0103lbitor timp de o zi; elimina\u021bi \u00eentotdeauna \u00een\u0103lbitorul \u00een mod corespunz\u0103tor.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\"><strong>Concluzie<\/strong><\/h2>\n\n<p>Electroplacarea cromului pe alte metale este cunoscut\u0103 sub denumirea de cromare \u0219i are urm\u0103toarele avantaje.<\/p>\n\n<p>Acest strat cromat nu numai c\u0103 \u00eembun\u0103t\u0103\u021be\u0219te aspectul, dar cre\u0219te \u0219i duritatea suprafe\u021bei, o face mai u\u0219or de cur\u0103\u021bat \u0219i ofer\u0103 protec\u021bie \u00eempotriva coroziunii. Este ideal pentru aplica\u021bii comerciale \u0219i industriale.<\/p>\n\n<p>ChansMachining ca partener de produc\u021bie este gata s\u0103 v\u0103 ofere cele mai bune servicii de cromare. Avem o echip\u0103 de profesioni\u0219ti cu mare experien\u021b\u0103 \u0219i cu cele mai recente unelte pentru a r\u0103spunde cerin\u021belor produselor dvs. V\u0103 rug\u0103m s\u0103 nu ezita\u021bi s\u0103 ne contacta\u021bi ast\u0103zi pentru a afla cum v\u0103 putem ajuta cu proiectul dumneavoastr\u0103.<\/p>\n\n<h2 class=\"wp-block-heading\"><strong>FAQ<\/strong><\/h2>\n\n<p><strong>Ce fel de materiale pot fi placate cu crom?<\/strong><\/p>\n\n<p>Cromarea este una dintre cele mai populare tehnologii care implic\u0103 depunerea de crom pe diferite substraturi pentru a le \u00eembun\u0103t\u0103\u021bi protec\u021bia \u00eempotriva coroziunii, duritatea suprafe\u021bei \u0219i aspectul. Unele dintre cele mai utilizate materiale de placare sunt o\u021belul, o\u021belul inoxidabil, aluminiul, cuprul \u0219i aliajele sale, alama, bronzul \u0219i unele materiale plastice, de\u0219i acestea din urm\u0103 necesit\u0103 depunerea prealabil\u0103 a unui strat conductiv.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este posibil ca piesele dvs. metalice prelucrate s\u0103 rugineasc\u0103 sau s\u0103 se uzeze, deoarece acestea necesit\u0103 caracteristici de suprafa\u021b\u0103 \u00eembun\u0103t\u0103\u021bite pentru a dura mai mult \u0219i pentru a ar\u0103ta mai bine, ceea ce se poate ob\u021bine prin selectarea materialelor de cromare adecvate.<\/p>\n<p>C\u00e2nd piesele de prelucrare nu sunt protejate, acestea se vor \u00eenr\u0103ut\u0103\u021bi probabil foarte repede. Acest lucru duce la mai multe \u00eenlocuiri \u0219i, prin urmare, la costuri mai mari. <\/p>\n<p>Cromarea ar putea rezolva aceste probleme pentru dumneavoastr\u0103. Acesta presupune procesul de depunere a unui strat sub\u021bire de crom pe suprafa\u021ba metalului. Acest proces ofer\u0103 o suprafa\u021b\u0103 rezistent\u0103 la coroziune \u0219i u\u0219or de cur\u0103\u021bat. De asemenea, \u00eel face mai dur \u0219i \u00eei confer\u0103 un luciu metalic str\u0103lucitor. Ca ghid al nostru, informa\u021biile pe care le prezent\u0103m sunt cuprinz\u0103toare. V\u0103 ajut\u0103 s\u0103 alege\u021bi cea mai potrivit\u0103 cromare pentru proiectul dvs. pentru a ob\u021bine cel mai bun rezultat.<\/p>\n","protected":false},"author":1,"featured_media":14465,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-14809","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-ro"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ghidul de baz\u0103 pentru cromare - ChansMachining<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/chansmachining.com\/ro\/ghidul-de-baza-pentru-cromare\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ghidul de baz\u0103 pentru cromare - ChansMachining\" \/>\n<meta property=\"og:description\" content=\"Este posibil ca piesele dvs. metalice prelucrate s\u0103 rugineasc\u0103 sau s\u0103 se uzeze, deoarece acestea necesit\u0103 caracteristici de suprafa\u021b\u0103 \u00eembun\u0103t\u0103\u021bite pentru a dura mai mult \u0219i pentru a ar\u0103ta mai bine, ceea ce se poate ob\u021bine prin selectarea materialelor de cromare adecvate. 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