316L不锈钢在沉积盐碱混合物下的高温腐蚀

High-temperature Corrosion of 316L Stalnless Steel in Saline and Alkali Deposition

对316L不锈钢沉积4.2%NaOH、1.3%NaCl、4.4%KOH、3.7%KCl盐碱混合物后在450℃至900℃下8 h和1 min高温腐蚀行为进行了试验。探讨了316L不锈钢在沉积盐碱混合物下的高温腐蚀机理,分析了温度、腐蚀介质和氧化膜的稳定性等因素对316L不锈钢腐蚀的影响。结果表明,316L不锈钢在450℃至900℃的高温腐蚀环境下其腐蚀速率随着温度的上升而增加。

The experiments of high-temperature corrosion of 316L stainless steel in mix deposition of 4. 2% NaOH, 1.3% NaCl, 4.4% KOH and 3. 7% KCl at 450 ℃-900 ℃ for 8 hour and 1 min had been carried out. The high-temperature corrosion mechanism was discussed, and the effects of temperature, corrosion medium and stability of oxide film were analyzed. The results showed that： the corrosion rate of 316L stainless steel increased with the temperature increasing in corrosion medium at 450 ℃-900 ℃.