Effects of pH values on the stress corrosion cracking of 304L stainless steel in high-temperature and high-pressure water
-
摘要: 在高溫高壓水環境中,采用慢應變速率拉伸試驗方法,研究了不同pH值對304L不銹鋼應力腐蝕開裂行為的影響規律,并通過掃描電鏡對試樣斷口形貌進行觀察與分析.結果表明:在300℃時,304L不銹鋼在弱酸性和弱堿性溶液中的應力腐蝕開裂敏感性較大,且酸性越強,敏感性越大.在中性溶液中,304L不銹鋼的強度和塑性損失較小,應力腐蝕敏感性較小,斷口分析與之吻合.Abstract: The effects of pH values on the stress corrosion cracking(SCC) of 304L stainless steel in high-temperature and high-pressure water were studied using slow strain rate tension(SSRT) tests.The fracture morphology of SCC specimens was analyzed with the aid of scanning electron microscopy(SEM).It is shown that 304L stainless steel exhibits a high susceptibility to SCC in weak alkaline and acidic solutions at 300 ℃, and the susceptibility increases by decreasing the pH value of the solution.In neutral solutions, both the strength and toughness of 304L stainless steel display a limited loss, indicating that 304L stainless steel has a low susceptibility to SCC.Fractography analysis is also consistent with these conclusions.
-
Key words:
- stainless steel /
- stress corrosion cracking /
- corrosion /
- tensile testing
-
點擊查看大圖
計量
- 文章訪問數: 189
- HTML全文瀏覽量: 42
- PDF下載量: 14
- 被引次數: 0
下載:
