ASTM-G150 Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels and Related Alloys

ASTM-G150 - 2018 R24 EDITION - CURRENT
Show Complete Document History

Document Center Inc. is an authorized dealer of ASTM standards.
The following bibliographic material is provided to assist you with your purchasing decision:

Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels and Related Alloys
ORDER

Price:

$76.00        


Want this as a site license?

Scope

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 0).

Note 0

Examples of CPT measurements on sheet, plate, tubing, and welded specimens for various stainless steels can be found in Ref. (). See the research report.

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.

1.6 his 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.

Significance and Use

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.

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.

Keywords

critical pitting temperature; electrochemical test; pitting corrosion; stainless steel; ICS Number Code 77.140.20 (Steels of high quality)

To find similar documents by ASTM Volume:

03.02 (Corrosion of Metals; Wear and Erosion)

To find similar documents by classification:

77.140.20 (Stainless steels Including alloyed steels, corrosion-resistant steels, heat-resisting steels, etc.)

This document comes with our free Notification Service, good for the life of the document.

This document is available in either Paper or PDF format.

 

Customers who bought this document also bought:

ASTM-A276
Standard Specification for Stainless Steel Bars and Shapes

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

ASTM-A479
Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels

Document Number

ASTM-G0150-18R24

Revision Level

2018 R24 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

May 15, 2024

Document Type

Test Method

Page Count

13 pages

Committee Number

G01.11