ASTM B 766 : 1986 : R1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Specification for Electrodeposited Coatings of Cadmium
Hardcopy , PDF
11-11-2014
English
01-01-1998
Important note : All end users must be registered with an Account prior to user licenses being assigned.CONTAINED IN VOL. 02.05, 2017 Defines the requirements for electrodeposited cadmium coatings on products of iron, steel, and other metals.
| Committee |
B 08
|
| DevelopmentNote |
Supersedes ASTM A 165. (04/2002)
|
| DocumentType |
Standard
|
| Pages |
8
|
| ProductNote |
Reconfirmed 1998
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Superseded
|
| SupersededBy |
1.1 This specification covers the requirements for electrodeposited cadmium coatings on products of iron, steel, and other metals.
Note 1-Cadmium is deposited as a coating principally on iron and steel products. It can also be electrodeposited on aluminum, brass, beryllium copper, copper, nickel, and powder metallurgy parts.1.2 The coating is provided in various thicknesses up to and including 25 [mu]m either as electrodeposited or with supplementary finishes.
1.3 Cadmium coatings are used for corrosion resistance and for corrosion prevention of the basis metal part. The as-deposited coating (Type I) is useful for the lowest cost protection in a mild or noncorrosive environment where early formation of white corrosion products is not detrimental or harmful to the function of a component. The prime purpose of the supplementary chromate finishes (Types II and III) on the electroplated cadmium is to increase corrosion resistance. Chromating will retard or prevent the formation of white corrosion products on surfaces exposed to various environmental conditions as well as delay the appearance of corrosion from the basis metal.
1.4 Cadmium plating is used to minimize bi-metallic corrosion between high-strength steel fasteners and aluminum in the aerospace industry. Undercutting of threads on fastener parts is not necessary as the cadmium coating has a low coefficient of friction that reduces the tightening torque required and allows repetitive dismantling.
1.5 Cadmium-coated parts can easily be soldered without the use of corrosive fluxes. Cadmium-coated steel parts have a lower electrical contact resistance than zinc-coated steel. The lubricity of cadmium plating is used on springs for doors and latches and for weaving machinery operating in high humidity. Corrosion products formed on cadmium are tightly adherent. Unlike zinc, cadmium does not build up voluminous corrosion products on the surface. This allows for proper functioning during corrosive exposure of moving parts, threaded assemblies, valves, and delicate mechanisms without jamming with debris.
| ASTM A 165 : 1980 | Specification for Electrodeposited Coatings of Cadmium on Steel |
| ISO 2082:2017 | Metallic and other inorganic coatings — Electroplated coatings of cadmium with supplementary treatments on iron or steel |
| ASTM B 343 : 1992 : REV A : R2004 : EDT 1 | Standard Practice for Preparation of Nickel for Electroplating with Nickel |
| ASTM B 507 : 2014 : REDLINE | Standard Practice for Design of Articles to Be Electroplated on Racks |
| ASTM B 567 : 1998 | Standard Test Method for Measurement of Coating Thickness by the Beta Backscatter Method |
| ASTM E 8 : 2004 | Standard Test Methods for Tension Testing of Metallic Materials |
| QQ-P-416 Revision F:1991 | PLATING, CADMIUM (ELECTRODEPOSITED) |
| ASTM B 320 : 1960 : R2019 | Standard Practice for Preparation of Iron Castings for Electroplating |
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