DELPHI DX550041 CORROSION PROTECTIVE COATINGS - PHOSPHATE/ZINC/ORGANIC TYPE

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DELPHI DX550041 Document Information:

Title
CORROSION PROTECTIVE COATINGS - PHOSPHATE/ZINC/ORGANIC TYPE

Delphi Automotive Systems

Publication Date:
Dec 1, 2004

Scope:

This specification covers the basic requirements for a corrosion protective coating process consisting of zinc phosphate treatment, a zinc rich epoxy resin coating, and an aluminum tint organic top coating. The coating may be applied by dipping or spraying. All rinses, coatings, and topcoats shall be hexavalent chromium free.

The specification number DX550041 should be used on the drawing. The presence of a suffix after the specification number (example: DX50041-F) indicates an approved source supplemental qualification requirement, as described in Section 11.

The coating is suitable for bolts, clips and other ferrous parts where above normal levels of corrosion protection and freedom from hydrogen embrittlement are required.

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

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