Full Description

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose/Material Description.

Plating to this specification is subdivided into six (6) performance classes. Classes A, B, and C are plated using hexavalent chromium chemistries. Classes D, E, and F are plated using trivalent chromium chemistries.

• Class A (hexavalent) and Class D (trivalent):

Exterior components with severe service conditions, likely to include damage from denting, scratching, and abrasive wear, such as those encountered by automotive bumpers and assist steps.

• Class B (hexavalent) and Class E (trivalent):

Exterior components without stone-chipping exposure or other mechanical abuse, such as door handles or emblems (not on the front of the vehicle).

• Class C (hexavalent) and Class F (trivalent):

Interior components.

For exterior applications, discontinuous chromium plate (microporous (mp) or microcracked (mc)) in addition to a multiple layer nickel system shall be used.

For interior applications, a continuous chrome layer (r) is permissible. The use of discontinuous chromium or multiple-layer nickel systems is not required for interior components.

Plating per this specification is intended for use over metallic substrates; plating on plastics is specified in GMW14668. For plating of stainless substrates, see GMW15613.

Symbols.

Not applicable.

Applicability.

This type of finish shall be principally used for decorative purpose, including bright and other (e.g., satin, brushed, grained) appearances for interior and exterior applications, as defined by styling and specific appearance standards.

Remarks.

None.