X80鋼?dān)椞锻寥滥M溶液中應(yīng)力腐蝕裂紋擴(kuò)展行為機(jī)理
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-06-03
采用電化學(xué)極化曲線測試、EIS 測試、裂紋擴(kuò)展實驗和SEM分析研究了X80 管線鋼在鷹潭土壤溶液環(huán)境下的應(yīng)力腐蝕裂紋(SCC)擴(kuò)展行為及機(jī)理.
X80鋼?dān)椞锻寥滥M溶液中應(yīng)力腐蝕裂紋擴(kuò)展行為機(jī)理GROWTH BEHAVIOR AND MECHANISM OF STRESS CORROSION?CRACKS OF X80 PIPELINE STEEL IN SIMULATED YINGTAN SOIL?SOLUTION?采用電化學(xué)極化曲線測試、EIS 測試、裂紋擴(kuò)展實驗和SEM分析研究了X80 管線鋼在鷹潭土壤溶液環(huán)境下的應(yīng)力腐蝕裂紋(SCC)擴(kuò)展行為及機(jī)理. 結(jié)果表明, X80 管線鋼在酸性土壤環(huán)境中的裂紋擴(kuò)展速率隨著外加電位的降低呈現(xiàn)增加趨勢, 相較于開路電位下的裂紋擴(kuò)展, 在裂紋擴(kuò)展初期, -850 mV下裂紋擴(kuò)展速率較大, 而在裂紋快速擴(kuò)展階段, 過保護(hù)電位-1200 mV下裂紋擴(kuò)展速率更大; 同時X80管線鋼在酸性土壤環(huán)境中的SCC裂紋擴(kuò)展機(jī)制也隨著施加外加電位的不同而改變, 在外加電位高于約-930 mV時為陽極溶解與氫脆的混合機(jī)制, 負(fù)于-930 mV時則為氫脆機(jī)制.?
Stress corrosion cracking (SCC) behavior and mechanism of X80 pipeline steel in the simulated?solution of Yingtan in China was investigated with electrochemical polarization curves, EIS, slow-rate-loading?crack-growth test and SEM. Results showed that the applied polarization potential played an important role in?SCC growth behavior and mechanism of X80 pipeline steel in the simulated solution of the acid soil environment.?With the decreasing of the applied potential, the crack propagation rate increased constantly. In comparison to the?crack propagation at the open circuit potential, the cracks extended faster in the initial stage of crack propagation?when the applied potential was -850 mV; nevertheless, in the rapid propagation stage, the rate of its propagation?was magnified with the application of -1200 mV potential. In addition, the crack propagation mode varied with?different applied potentials: it was mixed-controlled by both anodic dissolution (AD) and hydrogen embrittlement?(HE) when the applied potential was more positive than -930?mV, and only in control of HE when the potential was less?than -930 mV.
作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，艾荔艾擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊。在同客戶交易的過程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對當(dāng)前和未來的市場需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。
AILIAI
has been a reliable partner and supplier of sophisticated and high-quality
semi-finished products maed of alloys. In dialogue with our customers, we
optimise our products to meet the specific application requirements. AILIAI
develops the best alloy material solutions for current and future
challenges.
獲取更多我們供應(yīng)的合金和服務(wù)信息，請致電086-021-67660801或發(fā)電子郵件kefu@ailiaigroup.com聯(lián)系我們，您也可以通過微博，微信，領(lǐng)英，XING，臉書和推特與我們互動。
For
more information on the alloys and services that we supply,?call
us?at
086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch
on social media, we are constantly active on?Weibo,?Weixin,?LinkedIn,?XING, Facebook?and?Twitter.