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GMW4205

Plating Multilayer Coating/Black Type

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Organization: GMW
Publication Date: 1 October 2012
Status: inactive
Page Count: 5
scope:

This specification covers requirements for a corrosion resistant black finish over an electrolytically deposited zinc-iron alloy, nickel alloy and/or zincnickel alloy substrate.

Material Description. This coating system shall be free of hexavalent chromate in final product per GMW3059 requirements. The plating shall be called out on the part drawing per example shown in paragraph 7.

Typical Application. This coating is intended primarily for bulk processed small steel parts such as bolts, screws and nuts used on exterior and interior visible parts (cosmetic applications). This coating is especially suitable for internal drive (cross recess, 6 lobed socket etc.) threaded fasteners and self drilling and tapping screws.

Remarks. Use of this coating system on threaded surface and/or bearing surface of joints could affect the torque-tension relationship. It is recommended that a torque-tension study of the fastener joint be performed before releasing this finish on any new application.

Document History

December 1, 2013
Plating Multilayer Coating/Black Type
This specification covers requirements for a corro-sion resistant black finish over an electrolytically deposited zinc-iron alloy, nickel alloy and/or zinc-nickel alloy substrate.
GMW4205
October 1, 2012
Plating Multilayer Coating/Black Type
This specification covers requirements for a corrosion resistant black finish over an electrolytically deposited zinc-iron alloy, nickel alloy and/or zincnickel alloy substrate. Material...
December 1, 2011
Plating Multilayer Coating/Black Type
This specification covers requirements for a corrosion resistant black finish over an electrolytically deposited zinc-iron alloy, nickel alloy and/or zinc-nickel alloy substrate. Material...
October 1, 2004
Plating Multilayer Coating/Black Type
This specification covers requirements for a corrosion resistant black finish over an electrolytically deposited zinc-iron alloy, nickel alloy and/or zinc-nickel alloy substrate. Material...
October 1, 2001
Plating Multilayer Coating/Black Type
1 Scope This specification covers requirements for a corrosion resistant black organic finish over an electrolytically deposited zinc-iron alloy, nickel alloy and/or zincnickel alloy substrate.

References

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