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Local corrosion

2016-11-11 Rongda test 702 times

Local corrosion
Detection Content

Detection Purpose: Check the corrosion resistance of materials

Detection range: Petroleum pipeline, pressure vessel, boiler, liquefied gas tank, valve, flange, weld, carbon steel,

Types of local corrosion: pitting corrosion, crevice corrosion, galvanic corrosion, intergranular corrosion, selective corrosion, stress corrosion, hydrogen-induced cracking, corrosion fatigue, wear corrosion, etc.SSC hydrogen sulfide stress corrosionThe fracture of metal materials under the action of fixed tensile stress and specific medium is called stress corrosion.The commonly used metal materials in engineering, such as stainless steel, copper alloy, carbon steel and high strength steel, may produce stress corrosion in specific medium. Depending on the severity of the corrosion conditions, the material may fracture in a matter of minutes or years.In the process of corrosion, microcracks appear first and then expand into macroscopic cracks. Once a crack is formed, it grows quickly.

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SSC hydrogen sulfide stress corrosion

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