This International Standard specifies four methods for determination of the susceptibility or nickel-based alloys to intergranular corrosion.
These methods are for laboratory testing of suscep-tibility only, and a direct correlation with inter-granular corrosion in actual service may not occur unless the service medium is the same as the test medium.
The methods covered are as follows:
— Method A: iron(III) sulfate —sulfuric acid test (section 2);
— Method B: copper —copper-sulfate —16 % sulfuric acid test (section 3);
— Method C: hydrochloric acid test (section 4);
— Method D: nitric acid test (section 5);
The appropriate method for use with a given alloy, the selection of sensitizing treatment, and the ac-ceptance criteria to be used in any evaluation have to be agreed between the buyer and seller of the alloy. As a guide, the methods specified in this In-ternational Standard should be applicable to those nickel-based alloys used for corrosion service and listed in ISO 62O7[1],
BS EN ISO 9400:1996 history
0000 BS EN ISO 9400:1996(2000)
1996BS EN ISO 9400:1996 Nickel-based alloys. Determination of resistance to intergranular corrosion