Letter 27057

Thin Dense Chrome Plate vs Chrome Plate [New York] 

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Please explain the difference between two platings - Thin Dense Chrome and standard Chrome Plate. Some platers do one but not the other. Both say the same Mil spec applies. AMS-QQ-C-320 [link is to info about spec at TechStreet]. The standard chrome plater I deal with says he can plate standard chrome plate .0002. Are there limits to how thick "Thin Dense Chrome" can be?

Is there a limit of how thin standard "Chrome Plate" can be? One plater told me that there are chemical differences between the two and the application is what determines the difference - if so, what are the criteria for each?

Thank You in advance for as much input as possible.

Nancy Boice
Purchasing Dept - Elmira, New York, USA

Nancy,

AMS-QQ-C-320 is a standard for hard chrome and this standard include also a flash chrome who is about 0,0002 inch this can be plated from a regular chrome solution but if you need a thicker chrome deposit so must this be chrome plated in a chrome solution who woorks in a higher temperature and also different additiv than a regular chrome solution contents.

Regards

Anders Sundman     surface finishing engineer Sweden

Difference between regular chrome and Thin Dense Chrome goes beyond what Specifications cover. It is related to chemistry, current density, temperature, etc. The deposit is also different regarding physical and mechanical properties, the later being basicaly harder and without cracks. It is, to my knowledge, a proprietary modification of a regular chrome bath.

Guillermo Marrufo
Monterrey, NL, Mexico

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