ASTM-B875 2013

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B875-96(2013) Standard Specification for Aluminum Diffusion Coating Applied by Pack Cementation Process

Published By	Publication Date	Number of Pages
ASTM	2013	3

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Categories: 25.220.40 - Metallic coatings, ASTM

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Description

ASTM B875-96-Reapproved2013

Historical Standard: Standard Specification for Aluminum Diffusion Coating Applied by Pack Cementation Process

ASTM B875

Scope

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.

Keywords

aluminizing; corrosion-resistant coatings; diffusion coating; pack cementation

ICS Code

ICS Number Code 25.220.40 (Metallic coatings)

DOI: 10.1520/B0875-96R13

Additional information

Standard Title	B875-96(2013) Standard Specification for Aluminum Diffusion Coating Applied by Pack Cementation Process
Published Code	ASTM
Publication Date	2013
Pages Count	3
ICS Codes	25.220.40 - Metallic coatings