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Old 05-21-2014, 04:56 PM
WoodlandHills WoodlandHills is offline
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The whole plating process is hugely toxic. If one tried to introduce the process for cosmetic purposes for the first time today it would never get past the EPA. Here in the LA basin IIRC all the existing platers are grandfathered in and you couldn't hope to open up a new shop today. Even cadmium platers and anodisers have a lot of similar hoops to pass through to get approval. Only the fact that such processes are indespensible to modern industry keeps them from being banned entirely like asbestos.
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Old 05-21-2014, 05:18 PM
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simplyconnected simplyconnected is offline
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There are two types of chrome, hexavalent and trivalent. This is due to the number of electrons in the atoms, hex has six and tri has three. Another distinction is, hexavalent chrome looks creamy and lustrous.

Trivalent chrome has a bluish tint that some folks can spot right away. Trivalent chrome is environmentally safe and easy to deal with.

Back in the day, all of the auto companies used hexavalent chrome. Today, none of them do (and they stand very firm on this). If parts come in with hexavalent chrome, they get sent back to the vendor or a ' specification deviation' must be written and approved (nobody wants their name on this).

So if you see chrome on a modern car, it is trivalent with rare exception. Tri is still very beautiful but not considered, 'show chrome'. - Dave
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