高速火焰噴塗鐵基非晶合金之腐蝕磨耗行為研究

A Study on Corrosion and Wear Behavior of High Velocity Oxygen Fuel Fe-based Amorphous Alloy Coating

李弘彬(Hung-Bin Lee) ； 林子敬(Tzu-Jing Lin) ； 吳柏勳(Po-Hsun Wu) ； 蕭瑞昌(Ruey-Chang Hsiao)

《防蝕工程》 36卷1期 (2022/03) Pp. 12-22

https://doi.org/10.6376/JCCE.202203_36(1).0002

摘要

本研究運用銷與環（block-on-ring）腐蝕磨耗系統探討鐵基非晶合金之腐蝕磨耗行為，鐵基非晶合金鍍層以高速火焰噴塗技術製備，本研究主要在釐清鐵基非晶合金之腐蝕與磨耗行為，在海水中研究腐蝕與磨耗交互作用，利用動電位極化曲線與摩擦係數量測，探討不同極化電位對鍍層腐蝕磨耗的影響，並透過SEM、TEM、XPS觀察腐蝕狀況。實驗結果鐵基非晶合金在腐蝕作用下先產生FeO溶解，而後由Cr_2O_3形成鈍化層保護，當腐蝕加劇Cr_2O_3轉變為CrO_3時將溶解失效，此時改由MoO_2提供保護，在腐蝕磨耗方面由於鐵基合金硬度高在低極化電位下磨損率非常低，隨著極化電位提升表面形成較軟鈍化層，造成磨損率隨著極化電位而上升。

關鍵字

高速火焰噴塗 ； 腐蝕 ； 腐蝕磨耗 ； 鐵基非晶合金

並列摘要

In this study, the corrosion-wear behavior of a Fe-based amorphous alloy coating was analyzed using a pinon-ring corrosion abrasion system. The Fe-based amorphous alloy coating was prepared by the high velocity oxygen fuel (HVOF) method. The purpose of this article is to study the corrosion-wear behavior of this Fe-based amorphous alloy coating in sea water. The dynamic potential polarization curve and friction coefficient measurement were used to explore the influence of different polarization potentials on the corrosion-wear behavior of the Fe-based amorphous alloy coating. The corrosion behavior of the coating was also analyzed using SEM, TEM and XPS. The experimental results show that under low polarization potential, after the FeO is dissolved, the chromium element in the Fe-based amorphous alloy coating will form Cr_2O_3 to produce a passivation protective layer. However, when the polarization potential is increased, the CrO_3 will begin to dissolve. Subsequently, MoO_2 will provide more effective corrosion resistance of this Fe-based amorphous alloy coating. In terms of corrosion-wear behavior, owing to high hardness of the Fe-based amorphous alloy, the wear rate under low polarization potential is very slow. When the polarization potential increases, a softer passivation layer will be formed on the surface of the coating, which will cause the wear rate to increase.

並列關鍵字

HVOF ； Corrosion ； Corrosion wear ； Fe-base amorphous alloy

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