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ASTM B875-96

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Standard Specification for Aluminum Diffusion Coating Applied by Pack Cementation Process

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1.1 This specification covers the requirements for aluminum diffusion of metals by the pack cementation method. Pack diffusion employs the chemical vapor deposition of a metal which is subsequently diffused into the surface of a substrate at high temperature. The material to be coated (substrate) is immersed or suspended in a powder containing aluminum (source), a halide salt (activator), and an inert diluent such as alumina (filler). When the mixture is heated, the activator reacts to produce an atmosphere of aluminum halides which transfers aluminum to the substrate for subsequent diffusion. The aluminum-rich surface enhances corrosion, thermal stability, and wear-resistant properties.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


SDO ASTM: ASTM International
Document Number B875
Publication Date June 10, 1996
Language en - English
Page Count 3
Revision Level 96
Supercedes
Committee B08.03
Publish Date Document Id Type View
June 10, 1996 B0875-96 Revision
June 1, 2024 B0875-96R24 Reaffirmation
June 1, 2018 B0875-96R18 Reaffirmation
Dec. 1, 2013 B0875-96R13 Reaffirmation
Aug. 1, 2008 B0875-96R08 Reaffirmation
Sept. 10, 2003 B0875-96R03 Reaffirmation