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GMNA - GM4435M

Protective Finishes - Phosphate Type

inactive, Most Current
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Organization: GMNA
Publication Date: 1 September 2010
Status: inactive
Page Count: 5
scope:

This standard covers corrosion protective finishes for iron and steel whose basic characteristic is zinc phosphate treatment and a subsequent protective compound. A grade with zinc phosphate only may be designated. A suffix code system is provided for designating certain limitations on compounds.

Parts coated with this coating are typically used internally for engines and transmissions or in areas where minimum corrosion protection is required.

Parts coated to this shall be free of hexavalent chromate per GMW3059 requirements. GMW3034 will be used as a referee test.

Documents that specify GM4435M, Code C shall meet the requirements of GM4435M, Code A.

Use of this finish on threaded surfaces and/or bearing surfaces 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 a new application.

Coefficient of friction/torque tension values in this specification are also determined at ambient temperatures. New applications for this finish should be tested to confirm performance under application specific, operating conditions.

Finishes conforming to the requirements of this specification can be used in the application range of -50 to 120°C. For applications outside of this temperature range consult your local Material Engineering.

Finishes with oil coatings are not recommended for use against plastic surface.

This specification is not to be used on new designs. It is recommended to use GMW3179 on similar applications on new designs.

Document History

GM4435M
September 1, 2010
Protective Finishes - Phosphate Type
This standard covers corrosion protective finishes for iron and steel whose basic characteristic is zinc phosphate treatment and a subsequent protective compound. A grade with zinc phosphate only may...
March 1, 2007
Protective Finishes – Phosphate Type
This standard covers corrosion protective finishes for iron and steel whose basic characteristic is zinc phosphate treatment and a subsequent protective compound. A grade with zinc phosphate only may...
October 1, 2004
Protective Finishes – Phosphate Type
This specification covers corrosion protective finishes for iron and steel whose basic characteristic is zinc phosphate treatment and a subsequent protective compound. A grade with zinc phosphate...
December 1, 1998
Protective Finishes - Phosphate Type
1 SCOPE. This specification covers corrosion protective finishes for iron and steel whose basic characteristic is zinc phosphate treatment and a subsequent protective compound. A grade with zinc...
June 1, 1997
Protective Finishes - Phosphate Type
A description is not available for this item.
January 1, 1996
Protective Finishes - Phosphate Type GM6035M is Scheduled for Deletion by January 2000, Do Not Use on New Applications
A description is not available for this item.

References

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