DELPHI DX550078 CORROSION PROTECTIVE COATINGS PHOSPHATE/ELECTRO-ORGANIC/OIL TYPE
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DELPHI DX550078 Document Information:
Title
CORROSION PROTECTIVE COATINGS PHOSPHATE/ELECTRO-ORGANIC/OIL TYPE
Delphi Automotive Systems
Publication Date:
Dec 1, 2004
Scope:
This specification covers the basic requirements for a black corrosion
protective coating which is
produced by the use of the bulk electrodeposition process or, if the
parts do not lend themselves
to barrel processing, the parts may be racked prior to the
electrodeposition process. All rinses,
coatings, and topcoats shall be hexavalent chromium free.
This process is particularly effective where thread build up of paint
in recessed areas is
undesirable and also where elongated recessed areas must be protected.
This coating is suitable for
bolts, nuts, clips and other small ferrous or nonferrous parts where
above normal corrosion
protection or adhesion and decorative black color are desired.
Use of this finish 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 a new application.
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