TC4钛合金在O2 + CO2 气氛的高温高压模拟水沉积液中表面形成的钝化膜研究

张雅妮, 王思敏, 樊冰

Corrosion and Passivation Behavior of TC4 Ti-alloy in a Simulated Downhole Liquid in High-temperature and High-pressed O2 + CO2 Environment

ZHANG Yani, WANG Simin, FAN Bing

表5 TC4钛合金在不同环境中的阻抗谱拟合参数

Table 5 Fitting electrochemical parameters of EIS of TC4 Ti-alloy in different environments

Environment Rs / Ω∙cm2 Qdl / F∙cm-2 ndl Rct / Ω∙cm2 Cf / F∙cm-2 Rf / Ω∙cm2 Rs / Ω∙cm2 O2 0.8864 4.059 × 10-4 0.6947 239.8 3.966 × 10-4 0.7836 6.609 × 104 O2 + CO2 1.632 7.578 × 10-4 0.6321 291.1 2.492 × 10-4 - 3.579 × 104 CO2 0.6296 1.116 × 10-3 0.5874 191.2 2.74 × 10-4 - 1.183 × 104