ASTM G150-13
Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels

Standard No.

ASTM G150-13

Release Date

2013

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM G150-18

Latest

ASTM G150-18

Scope

5.1 This test method provides a prediction of the resistance to stable propagating pitting corrosion of stainless steels and related alloys in a standard medium (see Note 1). The CPT test can be used for product acceptance, alloy development studies, and manufacturing control. In the case of product acceptance, the supplier and user must agree upon the preconditioning of the specimen with regard to surface finish. The test is not intended for design purposes since the test conditions accelerate corrosion in a manner that does not simulate any actual service environment.

5.2 Another method to determine the potential independent CPT with an electrochemical technique has been discussed in the literature (1-4). This test method involves a potentiodynamic (potential sweep) procedure performed on specimens at different temperatures. A comparison (2) of the test method described in this test method and the potentiodynamic technique has indicated no difference in the test result obtained.

1.1 This test method covers a procedure for the evaluation of the resistance of stainless steel and related alloys to pitting corrosion based on the concept of the determination of a potential independent critical pitting temperature (CPT).

1.2 This test methods applies to wrought and cast products including but not restricted to plate, sheet, tubing, bar, forgings, and welds, (see Note 1).

Note 1—Examples of CPT measurements on sheet, plate, tubing, and welded specimens for various stainless steels can be found in Ref (1).² See the research reports (Section 14).

1.3 The standard parameters recommended in this test method are suitable for characterizing the CPT of austenitic stainless steels and other related alloys with a corrosion resistance ranging from that corresponding to solution annealed UNS S31600 (Type 316 stainless steel) to solution annealed UNS S31254 (6 % Mo stainless steel).

1.4 This test method may be extended to stainless steels and other alloys related to stainless steel that have a CPT outside the measurement range given by the standard parameters described in this test method. Appropriate test potential and solution must then be determined.

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of th......

ASTM G150-13 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D1293 Standard Test Methods for pH of Water
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM G1 Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens
• ASTM G107 Standard Guide for Formats for Collection and Compilation of Corrosion Data for Metals for Computerized Database Input
• ASTM G193 Standard Terminology and Acronyms Relating to Corrosion
• ASTM G3 Standard Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing
• ASTM G46 Standard Guide for Examination and Evaluation of Pitting Corrosion
• ASTM G5 Standard Reference Test Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements

ASTM G150-13 history

• 2018 ASTM G150-18 Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels and Related Alloys
• 2013 ASTM G150-13 Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels
• 1999 ASTM G150-99(2010) Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels
• 1999 ASTM G150-99(2004) Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels
• 1999 ASTM G150-99 Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels