Black Passivate

Black Passivate, also known as Black Oxide Class 4, is a conversion coating applied to corrosion-resistant steel alloys, including stainless steels.

Black passivate, also known as black chromate or black oxide, is used to enhance the corrosion resistance and aesthetic appearance of metal surfaces, particularly zinc and zinc-nickel plated parts. Here are some common applications:

• Corrosion Protection: Black passivate provides an additional layer of protection against corrosion, especially for zinc and zinc-nickel coatings.
• Aesthetic Enhancement: The black finish is often used for its sleek, professional appearance, making it popular in consumer electronics, automotive parts, and hardware.
• Electrical Conductivity: Unlike some other coatings, black passivate maintains the electrical conductivity of the underlying metal, which is beneficial for electronic components.
• Improved Adhesion: It can also serve as a base layer that improves the adhesion of subsequent coatings or paints.

This process involves a carefully controlled chemical reaction that forms a thin, protective film on the metal surface, enhancing its durability and resistance to environmental factors.

Main Purpose:

• Produces a uniform, attractive, and non-reflective black finish on stainless steel and other metal surfaces.
• Provides improved corrosion resistance.
• Offers exceptional strength and elasticity.
• The finish does not chip, peel, craze, or rub off.

Industrial Applications:

• Used in various industries, including aerospace, automotive, firearms, and cutting tools.
• Prevents galling, scoring, and wear on moving parts.

Specifications:

                               Conforms to standards such as AMS-2700, ASTM A967, and MIL-DTL-14072