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篇名 CoCrFeNiM"_X(x = 0.1、0.25、0.5)系列高熵合金在3.5 wt. % NaCl含氧水溶液之腐蝕行為
卷期 36:1
並列篇名 Corrosion Behaviors of CoCrFeNiM"_X (x = 0.1, 0.25, 0.5) High Entropy Alloys in 3.5 wt. % NaCl Aerated Aqueous Solutions Respectively
作者 鄭子行蔡銘洪張詩戎顏秀崗
頁次 001-011
關鍵字 高熵合金腐蝕鈍化膜動態極化感應耦合電漿體質譜法化學分析電子光譜High-entropy alloysCorrosionpassive filmdynamic polarizationICP-MSXPSEI
出刊日期 202203
DOI 10.6376/JCCE.202203_36(1).0001

中文摘要

本研究主要探討CoCrFeNiM"_x(x=0.1, 0.25 ,0.5)高熵合金於3.5 wt. % NaCl含氧水溶液中進行動態極化測試,並透過ICP-MS及XPS分析CoCrFeNiM"_(0.25)高熵合金在經過3.5 wt. % NaCl含氧水溶液中進行動態極化測試時,在各電位下元素釋出離子的量及其鈍化膜組成,並且進一步探討其腐蝕機構,結果顯示Co(OH)_3,Fe(OH)_3和Cr(OH)_3之低溶度積k_(sp)值與穩定鈍化電流密度有緊密之關聯。研究顯示,M"元素的添加使腐蝕電位下降,因為在空氣中與低電位下,M"元素已形成穩定且緻密的氧化物與氫氧化物之鈍化膜,使鈍化電流(I_(pass))降低,並提高的孔蝕電位(E_(pit)),有效的提升抗蝕效果。

英文摘要

This research mainly aimed at the dynamic polarization test of CoCrFeNiM"x (x = 0.1, 0.25, 0.5) high-entropy alloy in 3.5 wt. % NaCl aerated aqueous solutions. The dynamic polarization test, the amount of elements released at each potential and the composition of the passivation film were analyzed by XPS and ICP-MS. The corrosion behaviors were also discussed. The results show that the stable passivation current density is related to the low solubility product k_(sp) value of Co(OH)_3, Fe(OH)_3, and Cr(OH)_3. The addition of M" lowers E_(corr) since the formation of stable and dense oxide and hydroxide passivation film in the air and at lower potential. The addition of M also reduces the passivation current (I_(pass)) and increases the pitting potential (E_(pit)), which improves anti-corrosion effect.

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