1 Scope
This standard specifies requirements for decorative, electroplated coatings of nickel plus chromium with and without copper undercoats on plastics materials. It permits the use of either a copper or ductile nickel undercoat to satisfy thermal cycle requirements.
This standard is not applicable to such coatings on plastics to be used for engineering purposes.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 3138 Terminology for metallic coating, chemical treatment and related process (neq ISO 2079)
GB/T 4955 Metallic coatings - Measurement of coating thickness - Coulometric method by anodic dissolution (idt ISO 2177)
GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (ISO 10289, IDT)
GB/T 6462 Metallic and oxide coatings - Measurement of coating thickness - Microscopical method (eqv ISO 1463)
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests (eqv ISO 9227)
GB/T 12334 Metallic and other inorganic coatings - Definitions and conventions concerning the measurement of thickness (idt ISO 2064)
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Information to be supplied to the electroplater
5 Service condition number
6 Designation
7 Requirements
8 Sampling
9 Test methods
Annex A (Normative) Thermal cycling test
Annex B (Informative) Examples of service environments for which the various service condition numbers are appropriate
Annex C (Normative) Ductility test
Annex D (Normative) Determination of sulfur content of electrodeposited nickel
Annex E (Normative) Determination of cracks and pores in chromium coatings
Annex F (Normative) Methods of test for the determination of thickness
Annex G (Normative) Combined thermal cycling and corrosion testing
Bibliography
