Intergranular Corrosion Testing

Intergranular corrosion is a kind of local corrosion which occurs along the crystal grains boundary or its adjacent area of a metal or alloy after exposure to a corrosive environment. The bonding force between crystal grains can be greatly weakened by intergranular corrosion, and in severe cases, the mechanical strength can completely disappear, leading to defects or critical failures. In the case of heating, the welding process, heat treatment or operation in high-temperature environment will lead to the problem of intergranular corrosion.

STEMart carries out professional intergranular corrosion testing to provide necessary data to screen the corrosion resistance of a range of metallic materials, such as stainless steel, nickel-based alloy, aluminum alloy and magnesium alloy, under certain conditions.

Test Capabilities

• Oxalic acid test: Rapid screening of materials of certain stainless steel grades which are essentially free of susceptibility to intergranular corrosion associated with chromium participates.
• Streicher test: Quantitative measurement of intergranular corrosion of stainless steel and nickel alloys based on weight loss determinations.
• Huey test: Check whether the material has been correctly heat treated, or evaluate the effectiveness of stabilizing elements and of reductions in carbon content in reducing susceptibility to intergranular corrosion in chromium-nickel stainless steel.
• Strauss test: Determine the susceptibility of austenitic stainless steel to intergranular corrosion associated with the precipitation of chromium-rich carbides based on a visual examination of the material.
• Copper sulfate test: Quantitative measurement of intergranular corrosion of stainless steel based on weight loss determinations.

STEMart's expert team can help you select the most appropriate method to evaluate the susceptibility of the material to intergranular corrosion. For more information about our intergranular corrosion testing services, please contact us.