ASTM A967/A967M-17
Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts

Standard No.

ASTM A967/A967M-17

Release Date

2017

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM A967/A967M-17

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/A380M.

1.3 Several alternative chemical treatments are defined for passivation of stainless steel parts. Appendix X1 and Appendix X2 give some nonmandatory information and provides some general guidelines regarding the selection of passivation treatments appropriate to particular grades of stainless steel. This specification 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 Ferricyanide-Nitric Acid Test, and

1.4.6 Practice F—Damp Cloth Test, and

1.4.7 Practice G—Boiling Water Immersion 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.

ASTM A967/A967M-17 Referenced Document

• ASTM A380/A380M Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
• ASTM B117 Standard Practice for Operating Salt Spray (Fog) Apparatus
• ASTM B254 Standard Practice for Preparation of and Electroplating on Stainless Steel
• ASTM B600 Standard Guide for Descaling and Cleaning Titanium and Titanium Alloy Surfaces
• ASTM B912 Standard Specification for Passivation of Stainless Steels Using Electropolishing

ASTM A967/A967M-17 history

• 2017 ASTM A967/A967M-17 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 2013 ASTM A967/A967M-13 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 2005 ASTM A967-05e2 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 2005 ASTM A967-05e1 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 2005 ASTM A967-05 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 2001 ASTM A967-01e1 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 2001 ASTM A967-01 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• 1999 ASTM A967-99e1 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts