Conversion Coating

Conversion coatings are coatings for metals where the part surface is converted into the coating with a chemical or electro-chemical process. Examples include chromate conversion coatings, phosphate conversion coatings, bluing, black oxide coatings on steel, and anodizing. They are used for corrosion protection, increased surface hardness, to add decorative color and as paint primers. Conversion coatings may be very thin, on the order of 0.00001". Thick coatings, up to 0.002", are usually built up on aluminium alloys, either by anodizing or chromate conversion.

Other articles related to "conversion coating, conversion coatings, conversion, coatings":

Chromate Conversion Coating
... Chromate conversion coating is a type of conversion coating used to passivate aluminum, zinc, cadmium, copper, silver, magnesium, and tin alloys ... Chromate conversion coatings are common on everyday items such as hardware and tools and usually have a distinctive yellow color ...
Chromate Conversion Coating - Composition
... The composition of chromate conversion solutions varies widely depending on the material to be coated and the desired effect ... Iridite 14-2, a chromate conversion coating for aluminum, contains chromium(IV) oxide, barium nitrate and sodium silico fluoride ... Chromate coatings are soft and gelatinous when first applied but harden and become hydrophobic as they age ...

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