HIC(Hydrogen Induced Cracking) SSCC (Sulfide Stress Corrosion Cracking)

HIC (Hydrogen Induced Cracking) and SSCC (Sulfide Stress Corrosion Cracking) are two forms of failure that are very threatening to metal materials in specific corrosive environments, and HIC SSCC flanges are high-performance flanges designed specifically for this type of corrosion. HIC is caused by the absorption of hydrogen atoms by the metal in the humid hydrogen sulfide-containing environment, and hydrogen atoms are gathered in the internal defects of the material, combining with the hydrogen molecules to form hydrogen molecules, which generate huge internal stresses and ultimately lead to material cracking. SSCC is that under the joint action of hydrogen sulfide-containing medium and tensile stress, the sulfide film on the metal surface ruptures, causing the base metal and hydrogen sulfide to react electrochemically, generating hydrogen atoms and penetrating into the metal, which triggers stress corrosion cracking.