Effects of pH Value on the Stress Corrosion Cracking of Super 13Cr Tubing Steel

Abstract

Effects of pH value on the stress corrosion cracking (SCC) of super 13Cr tubing steel were investigated in 3.5% NaCl solution, that mechanics properties and fracture morphology and SCC resistance and stress corrosion cracking susceptibility index (kscc) were analyzed by slow strain rate tensile (SSRT) stress corrosion cracking experiment method and σ-ε curve and SEM. the results Effects of pH value on the stress corrosion cracking (SCC) of super 13Cr tubing steel were investigated in 3.5% NaCl solution, that mechanics properties and fracture morphology and SCC resistance and stress corrosion cracking susceptibility index (kscc) were analyzed by slow strain rate tensile (SSRT) stress corrosion cracking experiment method and σ-ε curve and SEM. the results showed that super 13Cr tubing steel has good properties of resistance stress corrosion cracking in acidic medium, effects of pH value on super13Cr tubing steel resistance stress corrosion was not very obviously in the acidic medium, with pH value decreased, super 13Cr tubing steel tensile strength decreased, elongation rate decreased, fracture area contraction ratio decreased, break time reduced, the tendency of the stress corrosion cracking increased. the stress corrosion cracking susceptibility index kσ and kε were all increasing, that increased degree of kε were obviously than kσ, effects of pH value on the plastic deformation of super 13Cr tubing steel were greater than tensile strength.

Effects of Temperature on Galvanic Corrosion Behaviors of Super 13Cr and P110 Steel Couples in NaCl Solution

“…With respect to common 13Cr stainless steel, which could be used in hostile corrosive environment, because of its high tensile strength with corrosion resistance and lower economic cost [5]. As a result of the severer impact of corrosion in electrolyte solution increasingly, super 13Cr martensitic stainless steel with high corrosion resistance is widely used in the development and production process of oil and gas field [6]. In the paper, the measurement method of galvanic corrosion was employed to investigate galvanic corrosion behaviors of 13Cr-P110 steel couple in NaCl solution at different temperature.…”