Black Passivation

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Passivation for Conventional Zinc Plating

Process


Zinc plating is usually deposited onto ferrous substrates to provide effective, powerful and beautiful corrosion resistance coating that improve the appearance of finished products.


Black Passivation

Okuno-Auromex has well known for a long time about passivation of zinc plating on steel. We have many benchmark’s products such as “ES COAT BLACK” series for black passivation, “ES COAT” and “SANCHROME” series for blue to iridescent passivation and “TRI BUMEX” only for blue passivation.



Application

Product

Plating Process

Feature

Acid Plating

Alkaline Plating

Black Passivation

ES Coat Black SOP

Outstanding trivalent chromating agent without silica and noble metal salt component. Provide uniform black color appearance, improve
corrosion resistance and good throwing power.

Iridescent Passivation

ES Coat



Premium trivalent chromating agent. Give light yellow tone, excellent heat resistance and superior corrosion resistance as well as
auto-remedy effects similar hexavalent chromium agent.

ES Coat A-AT



Alternative of trivalent chromating agent. Give tone from pale yellow to pale blue color and provides good corrosion resistance.

Sanchrome HB



Environmental friendly trivalent chromating agent without NOx generation. Give rainbow film from pink to light blue tone and easy to use in
one component.

Blue Passivation

Tri Bumux111K



Environmental friendly trivalent chromium chromating agent without chelating component. Give blue film to enhance high corrosion
resistance. Offer high bath life because of iron inhibitor Contained.

Tri Bumex 612C



High performance chromating agent that meet the automotive standard for GMW 3044 and DELPHI DX 551200. Provide blue to bright tone and high
corrosion resistance.

ES Coat A-NT



Alternative of trivalent chromating agent. Provide blue to light yellow tone and improve corrosion resistance.

Sanchrome Blue



Environmental friendly trivalent chromating agent without NOx generation. Give silver to blue color film and provide high corrosion
resistance as well as easy to use in one component.


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