SURFACE FINISHING
Yellow Chromate conversion coating
It is the process of developing a skinny protective chromate layer (approx. 2 µm). It provides superior corrosion resistance and enhances conductivity.
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Introduction
Typically, yellow chromate conversion coating is done on the surface of aluminum, magnesium, and their alloys. It is the process of developing a skinny protective chromate layer (approx. 2 µm). It provides superior corrosion resistance and enhances conductivity.
The shiny appearance with goldish color on the surface makes parts aesthetically appealing and last for an extended period.
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Specify alloy, protection intent and downstream assembly conditions
Yellow chromate conversion requirements should identify the applicable substrate, pre-cleaning/preparation, required coverage, corrosion or paint-adhesion intent, masked interfaces and whether electrical contact surfaces remain functional.
Engineering data to lock before release
| Substrate | Alloy/base material and incoming surface condition |
|---|---|
| Functional purpose | Corrosion protection, paint base or electrical interface |
| Coverage limits | Treated areas, masking and contact points |
| Acceptance | Color/coverage plus specified performance evidence |
Conversion-coating terminology varies by chemistry; use the controlled process or standard reference rather than color alone where compliance matters.
