ASTM B(). Standard Specification for Electrodeposited Coatings of Cadmium. standard by ASTM International, 03/01/ View all product details. 2. Discontinued; see Annual Book of ASTM Standards, Vol Replaced by Specification B 3. Annual Book of ASTM Standards, Vol 4. Abstract. This specification covers the requirements for electrodeposited cadmium coatings on products of iron, steel, and other metals. Cadmium coatings are.
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ASTM B Cadmium Plating | Keystone Finishing
This specification covers the requirements for electrodeposited cadmium coatings on products of iron, steel, and other asfm. 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. Electrodeposited asstm coatings shall be classified on the basis of thickness as Class 25, 12, 8, and 5. The coating shall be essentially pure cadmium produced by electrodeposition usually from an alkaline cyanide solution. The basis metal shall be subjected to such cleaning procedures as necessary to ensure a surface satisfactory for subsequent electroplating.
Cadmium shall be deposited directly on the basis metal part without an undercoat of another metal except when the part is either stainless steel or aluminum and its alloys. The plating shall be applied after all basis metal heat ast and mechanical operations. The thickness of the coating everywhere on the significant surface shall conform to the requirements of the specified class. The asfm coating 7b66 be sufficiently adherent to the basis metal to pass the tests.
The supplementary Type II chromate film shall be adherent, nonpowdery, and abrasion resistant. The thickness of electrodeposited cadmium coatings shall be determined by the applicable test methods. This abstract is a brief summary of the referenced standard.
It atm informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Note 1Cadmium 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.
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. 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.
Undercutting of b7666 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.
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. Asfm allows for proper functioning during corrosive exposure of moving parts, threaded assemblies, valves, and delicate mechanisms without jamming with debris. Referenced Documents purchase separately The documents listed asgm are referenced b7766 the subject standard but are not provided as part of the standard.
B Terminology Relating to Electroplating. Nonmagnetic Coatings on Magnetic Basis Metals. Today, some 12, ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence.
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Search book title Enter keywords for book title search. Land Use and Development. Abstract This specification covers the requirements for electrodeposited cadmium coatings on products of iron, steel, and other metals.
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ASTM B766 Cadmium Plating
F Standard Specification for Driven Fasteners: Nails, Spikes, and Staples. B Standard Specification for Refined Lead. Copyright Compu-tecture, Inc. FORMAT Single User Subscription Site License Subscription BOOKS All V766 PACKAGES All Packages EDITION to PUBLISHER.