EN ISO 12732:2008 Corrosion of metals and alloys - Electrochemical potentiokinetic reactivation measurement using the double loop method (based on Cihal's method)
WARNING — This International Standard may involve hazardous materials, operations and equipment.
It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
This International Standard specifies the method for measuring the degree of sensitization (DOS) in stainless steel and nickel-based alloys using the Double Loop Electrochemical Potentiokinetic Reactivation (DL-EPR) test (based on Čihal's method).
The method may be used for the quantitative assessment of deleterious thermal effects resulting in the formation of alloy-element-depleted zones at grain boundaries or in the matrix. However, attention should be paid when testing heat-affected weld zones, due to possible non-uniform distribution of sensitized zones along the fusion lines.
The results of the test can be used as an index to identify the potential susceptibility of stainless steel and nickel-based alloys to intergranular corrosion, pitting corrosion, and intergranular-stress corrosion cracking, but prediction of these corrosion modes depends on complementary specific testing.
This International Standard describes the general methodology and, in Annex C, gives examples of suitable test exposure conditions for specific alloys.
EN ISO 12732:2008 Referenced Document
ISO 643:2003 Steels - Micrographic determination of the apparent grain size
ISO 8044:1999 Corrosion of metals and alloys - Basic terms and definitions
EN ISO 12732:2008 history
2008EN ISO 12732:2008 Corrosion of metals and alloys - Electrochemical potentiokinetic reactivation measurement using the double loop method (based on Cihal's method)