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  • ASTM
    A967/A967M-13 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
    Edition: 2013
    $93.60
    Unlimited Users per year

Description of ASTM-A967 2013

ASTM A967 / A967M - 13

Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts

Active Standard ASTM A967 / A967M | Developed by Subcommittee: A01.14

Book of Standards Volume: 01.03




ASTM A967 / A967M

1. Scope

1.1 This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts. It includes several alternative tests, with acceptance criteria, for confirmation of effectiveness of such treatments for stainless steel parts.

1.2 Practices for the mechanical and chemical treatments of stainless steel surfaces are discussed more thoroughly in Practice A380 .

1.3 Several alternative chemical treatments are defined for passivation of stainless steel parts. Appendix X1 gives some nonmandatory information and provides some general guidelines regarding the selection of passivation treatment appropriate to particular grades of stainless steel. It makes no recommendations regarding the suitability of any grade, treatment, or acceptance criteria for any particular application or class of applications.

1.4 The tests in this specification are intended to confirm the effectiveness of passivation, particularly with regard to the removal of free iron and other exogenous matter. These tests include the following practices:

1.4.1 Practice A Water Immersion Test,

1.4.2 Practice B High Humidity Test,

1.4.3 Practice C Salt Spray Test,

1.4.4 Practice D Copper Sulfate Test,

1.4.5 Practice E Potassium FerricyanideNitric Acid Test, and

1.4.6 Practice F Damp Cloth Test.

Note 1 Free iron denotes iron present on the surface of the parts, including but not limited to iron contamination, iron-tool marks, residual-iron salts from pickling solutions, iron dust, atmospheric exposure, iron deposits in welds, embedded iron and iron oxide.

1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.6 The following precautionary caveat pertains only to the test method portions, Section 14 of this specification: 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems

B117 Practice for Operating Salt Spray (Fog) Apparatus

B254 Practice for Preparation of and Electroplating on Stainless Steel

Federal Specification

QQ-P-35C Passivation Treatments for Corrosion-Resistant Steels

Keywords

cleaning of stainless steel; descaling; passivation; tests for cleanliness of stainless steels;


ICS Code

ICS Number Code 77.140.20 (Steels of high quality)


DOI: 10.1520/A0967_A0967M-13

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ASTM A967 / A967M

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