SSC hydrogen sulfide stress corrosion test
Tianjin Rong Da Testing Co., Ltd. contact: Wang Jingfu
Cell phone: 13102238283 QQ:3144667033
Tel: 022-23892103 WeChat: 13102238283
SSC: NACE RM0175-2005 sulfide stress corrosion by this standard, and the difference is that SSC SSC corrosion cracking resistance test is corrosion test under the condition of high temperature, the SSC test is a corrosion test under normal temperature test equipment: P1500 type constant load tensile stress corrosion testing machine.
SSC sulfide stress corrosion is a special type of stress corrosion, but the difference with the stress corrosion usually said, corrosion stress usually said, it is the role of the anodic dissolution, and SSC is the main cathodic hydrogen charging. In the oil and natural gas (especially natural gas) pipeline, high pressure and high strength pipeline sulfide stress corrosion cracking will lead to serious accidents, so the need for anti SSC performance evaluation of pipeline steel, ensure the safety of pipeline.
HIC hydrogen induced cracking is also a kind of stress corrosion cracking:
The corrosion of steel in wet hydrogen sulfide environment depends on the performance of steel, environmental characteristics and other factors. An adverse effect on the pipeline steel and the pressure vessel steel is produced along the rolling direction of the crack. A plane crack tends to connect to the adjacent plane of the crack, which produces a step like crack along the thickness direction. These cracks reduce the effective wall thickness until the pipeline steel or pressure vessel is super stressed or damaged. Sometimes the crack is accompanied by the appearance of the surface hydrogen bubbles. It has been reported that the service failure is due to the crack.
Before the ladder shaped crack, crack, crack pressure of hydrogen bubble and hydrogen induced crack description stepped pipeline and pressure vessel steel crack type, but has now abandoned. Hydrogen induced cracking (HIC) is now widely used to describe the crack types and is used by the NACE international organization.