Co基合金在熔融NaCl-52%MgCl2中的腐蝕機理Co基合金在熔融NaCl-52%MgCl2中的腐蝕機理Corrosion behavior of Co-based alloys in molten NaCl-52%MgCl2 通過純Co及代表性的Co基合金GH5188和GH6159在520 ℃熔融NaCl-52%MgCl2(摩爾分數)中的腐蝕行為研究，揭示Co基合金在熔融氯化鹽中的腐蝕機理。結果表明：3種試樣的腐蝕動力學曲線近似滿足線性規律。腐蝕20 h后的掃描電鏡分析表明，純Co試樣表面形成了殼層結構；EDS及XRD分析表明，殼層成分主要為MgO，這在一定程度上起到了減緩腐蝕的作用。GH6159表面也出現類似殼層結構，GH5188表面有孔洞出現；腐蝕160 h后，GH5188表面出現大量互相連通的腐蝕孔洞。橫截面EDS分析表明，Co和Cr的含量均明顯降低。因此，Co基合金的腐蝕機理主要源于合金元素Cr 、Fe和Co等的氧化、溶解和揮發。 In order to explore the corrosion mechanism, the corrosion behaviour of two common Co-based alloys GH5188 and GH6159 immersed in high temperature NaCl-52%MgCl2 (mole fraction) molten salt for 160 h was measured. The results show that the corrosion kinetics curves are approximately linear. After being corroded for 20 h, there is a shell emerging on the surface of pure Co as well as GH6159 samples, which slows down the corrosion rate to some extent. Meanwhile, a lot of pores form on the surface of GH5188. And after being corroded for 160 h, these pores grow up and link together. The cross-section EDS analysis of GH5188 shows a decrease of Cr and Co content in the corrosion layer. Therefore, the mechanism of Co-based alloys is oxidation and dissolution of Cr, Fe and Co followed by volatilization of metal chloride. 全文下載：https://pan.baidu.com/s/1p-DKxPB_ISe6KjDXo6pyKA? 作為值得信賴的合作伙伴和高品質金屬合金的半成品供應商，通項公司擁有完善的服務體系和專業的團隊。在同客戶交易的過程中，我們力求根據不同的應用需求將我們的產品做到精益求精。針對當前和未來的市場需求，通項公司致力于為客戶提供最佳的金屬材料解決方案。 TXCO 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. TXCO develops the best alloy material solutions for current and future challenges. 獲取更多我們供應的產品和服務信息，請致電086-021-6786 0205或發電子郵件service@sinoav.com聯系我們，您也可以通過微信，微博，領英，臉書，推特和谷歌+與我們互動。 For more information on the products and services that we supply, call us at 086-021-6786 0205 or email us at service@sinoav.com. You can also get in touch on social media, we are constantly active on Weixin, Weibo, LinkedIn, Facebook, Twitter and Google+.
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