IS 10461 : Part 1 : 2025 Resistance to Inter-Granular Corrosion of Austenitic Stainless Steels - Method for Determination - Part 1 Corrosion Test in Nitric Acid Medium by Measurement of Loss in Mass (Huey Test)

1 SCOPE

1.1 This standard describes a procedure for determination of the resistance to intergranular corrosion of austenitic stainless steels in a nitric acid medium by measurement of the loss in mass, (Huey test).

1.2 This method is applicable to austenitic stainless steels supplied in the form of castings, rolled or forged products and tubes including weld metals and intended to be used in an oxidising media (for example, relatively concentrated nitric acid). In general, the Huey test should not be used for grades containing molybdenum unless the material tested is to be used in nitric acid service.

1.2.1 The presence or absence of intergranular corrosion in these tests is not necessarily a measure of the performance of the material in, other corrosive media. The tests do not provide a basis for predicting the resistance to other forms of corrosion such as general corrosion, pitting or stress corrosion cracking.

NOTE - It is important to note that the result of the corrosion test is only strictly valid for the corrosive medium used in the test. It constitutes a basis for estimating the resistance to intergranular corrosion but may not be used to check resistance to other forms of corrosion (general corrosion, pitting, stress corrosion, etc). It is necessary for the user to adapt the specified corrosion test to the use which will be made of the alloy. This test should, in no case, be considered as an absolute criterion of the quality of the alloy.