Description / Abstract:
This specification covers basic requirements for
copper-nickel-chromium electroplated plastic parts.
Material Description. This standard is intended
for the following applications:
Interior (Code A). Interior applications do not
require the use of discontinuous chromium or multiple layer nickel
systems. For interior applications, non-discontinuous chrome (r) is
permissible.
• Type 1: Standard interior usage.
• Type 2: Applications where higher coating
thicknesses are required and/or performance requirements are not
met with Type 1 (e.g., inside door handles, manual shifter decor
rings, or bezels, may require Type 2).
• Type 3: Small parts such as radio control
knob bezels. These parts do not require full plating approval per
GMW16193, but only require demonstration of plating performance per
this specification at Production Part Approval Process (PPAP).
Refer to Appendix B, Figure B3, for geometry limitations. Note: If
no interior type is listed on the detail drawing, Type 1 is
assumed.
Exterior (Code B). For exterior applications,
discontinuous chromium plate (microporous (mp) or microcracking
(mc)), in addition to a multiple layer nickel system, shall be
used.
• Type 1: Legacy type (not used for new
programs/approvals).
• Type 2: Standard exterior usage.
• Type 3: High corrosion service conditions
(wheel claddings and caps).
• Type 4: High corrosion calcium chloride
resistant (Russian mud) chromium. Note: If no exterior type is
listed on the detail drawing, Type 2 is assumed.
Symbols. Not applicable.
Applicability. This type of finish shall be
principally used for decorative purposes. Bright and other (e.g.,
satin, brushed, dark, or grained) appearances are for interior and
exterior plastic applications, as defined by styling and specific
appearance standards.