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

Importancia y uso:

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.

Subcomité:

G01.11

Referida por:

G0215-17R24

Volúmen:

03.02

Número ICS:

77.140.20 (Steels of high quality)

Palabras clave:

critical pitting temperature; electrochemical test; pitting corrosion; stainless steel;