Zhang Yanjun

Inhibition Effect of Some Inhibitors on Super 13Cr Steel Corrosion in Completion Fluid

The inhibition effect of some inhibitors on super 13Cr stainless steel corrosion in CaCl2 completion fluids with 1.0MPa CO2 was investigated. The results indicated that the super 13Cr stainless steel was susceptible to uniform and stress corrosion cracking (SCC) without inhibitors. After addition urotropine, the uniform corrosion was inhibited, and the SCC sensitivity of super 13Cr steel decreased. Electrochemical noise results indicated that the noise resistance increased obviously after addition urotropine.

Study on the Corrosion Behavior of Aqueous Extract of Thermal Insulation Materials to A3 Steel

The pH, conductivity and ions contents of aqueous extract of thermal insulation materials and deionized water were tested. Their corrosion behavior to A3 steel was investigated by static weight loss method. The results showed that the corrosion rate of glass wool was the lowest and performed local corrosion. The danger was the largest. Silica aerogel insulation blankets performed homogeneous corrosion and the corrosion rate was lower than that of deionized water. Aqueous extract of polyurethane foams expanded with HCFC-141b and CO2 were homogeneous corrosion. The corrosion rate of the former was slightly lower than that of the latter，but both were larger than deionized water.