Detection Content

Detection Purpose: Check the resistance of materials to intercrystalline corrosion

Detection range: Ni-cr bearing alloy

Intercrystalline corrosion:


Intergranular corrosion is a common local corrosion of metal corrosion, corrosion from the surface of the metal, along the grain boundary to the internal development of the grain, making the adhesion between the grains greatly weakened, reducing the strength of the material, serious can make the material's mechanical strength completely lost, it is one of the forms of local corrosion with great harm. There is no obvious change in the appearance of materials after intergranular corrosion, but the strength has been completely lost, which will cause sudden damage to the equipment. Therefore, it is of great significance for the national economic construction to study the mechanism of intergranular corrosion and take effective protective measures.


Nickel base alloy intercrystalline corrosion A method: ferric sulfate — Sulfuric acid test


Applicable to ferric sulfate (Ⅲ) & ndash; The sensitivity of nickel base alloy to intercrystalline corrosion was determined in sulfuric acid test solution.