Polishing vs chrome plating aluminum impala Grille - Impala Tech
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post #1 of 3 (permalink) Old 06-10-2020, 04:21 PM Thread Starter
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Polishing vs chrome plating aluminum impala Grille

Has anyone on here ever chrome plated their aluminum impala grille? I want to chrome plate mine but Iíve heard that chrome plating often flakes off of grilles. Wouldnít mind polishing mine but I think my lower grille will have to be plated after some imperfections are fixed. Also which gives the best shine?
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post #2 of 3 (permalink) Old 06-10-2020, 04:57 PM
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Chrome (properly applied) is the shiniest of all. Aluminum is hard to chrome plate because the acids that allow the chrome ions to be electroplated upon the base metal dissolves in the acid. Factory polished the aluminum grill : THEN it was anodized with a clear coating to protect the shine from the atmosphere. Aluminum like stainless steel sublimates which is a fancy way of saying it rusts to a point if left out. That layer of rust is only a few molecules thick, then that layer of rust prevents oxygen in the air from getting to the base metal, protecting it from furthr corrosion. It is however dul in appearance which is why aluminum and stainless trim once polished to a high shine was anodized.

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post #3 of 3 (permalink) Old 06-10-2020, 05:18 PM Thread Starter
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Quote:
Originally Posted by Big Dave View Post
Chrome (properly applied) is the shiniest of all. Aluminum is hard to chrome plate because the acids that allow the chrome ions to be electroplated upon the base metal dissolves in the acid. Factory polished the aluminum grill : THEN it was anodized with a clear coating to protect the shine from the atmosphere. Aluminum like stainless steel sublimates which is a fancy way of saying it rusts to a point if left out. That layer of rust is only a few molecules thick, then that layer of rust prevents oxygen in the air from getting to the base metal, protecting it from furthr corrosion. It is however dul in appearance which is why aluminum and stainless trim once polished to a high shine was anodized.

Big Dave
Thanks. I have a local guy who does ploishing and plating. He plated some aluminum parts for me before but it wasnít a grille. Was just wondering if it would flake off. Especially with highway driving. I wish I was as knowledgeable as you are on this stuff.
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