Detection Content

Detection Purpose: Check the resistance of materials to intercrystalline corrosion

Detection range: Stainless steel and its alloys

Intercrystalline corrosion:


A type of local corrosion. Corrosion extending internally along the boundary between metallic grains. Intergranular corrosion is a kind of local corrosion failure that occurs and develops along or close to the intergranular of materials in a suitable corrosion environment. Intercrystalline corrosion starts from the surface of metal materials and develops inwards along grain boundaries, resulting in the loss of intercrystalline adhesion and almost complete loss of material strength. For example, stainless steel, which suffers from intercrystalline corrosion, is still very bright, but can be broken into fine powder when struck lightly.


Stainless steel intercrystalline corrosion D method — Test method for 65% nitric acid corrosion of stainless steel


Suitable for testing intercrystalline corrosion tendency of molybdenum-containing austenitic stainless steel. The corrosion rate in 10% nitric acid and 3% hydrofluoric acid solution at 70℃ was used to determine the intercrystalline corrosion tendency.