FeCoCrMoCBY块体非晶合金在强酸介质中的耐蚀性能  

Study of Anticorrosion Ability of Fe_(43.7)Co_(7.3)Cr_(14.7)Mo_(12.6)C_(15.5)B_(4.3)Y_(1.9) Bulk Metallic Glass in Strong Acid Solutions

作　　者：潘杰[1] 张猛[1] 谌祺[1] 柳林[1] 

机构地区：[1]华中科技大学塑性成型及模具技术国家重点实验室,湖北武汉430074

出　　处：《稀有金属材料与工程》2008年第A04期805-808,共4页Rare Metal Materials and Engineering

基　　金：高等学校博士学科点专项科研基金(20060487069);教育部新世纪优秀人才支持计划(NCET-04-0709)

摘　　要：采用静态浸泡法研究了Fe43.7Co7.3Cr14.7Mo12.6C15.5B4.3Y1.9块体非晶合金(BMG)在浓HCl、浓H2SO4、浓HNO3以及王水中的腐蚀行为。研究表明该合金在强酸介质中具有优异的耐蚀性,在王水中浸泡236h的平均腐蚀速率仅为不锈钢的1/130。利用扫描电子显微镜(SEM)和X射线光电子能谱(XPS)分别对非晶合金在王水中腐蚀后的形貌和表面钝化膜的成分进行了分析。结果表明,合金的非晶态结构促使腐蚀过程中发生均匀腐蚀以及Cr元素在钝化膜中的富集是其具有强耐蚀能力的主要原因。The corrosion resistance of Fe43.7Co7.3Cr14.7Mo12.6C15.5B4.3Y1.9 bulk metallic glass （BMG） in concentrated HCl, H2SO4, HNO3 and aqua regia solution were investigated by means of weight-loss measurements. It was found that the BMG exhibited superior corrosion resistance; the average corrosion rate in aqua regia solution is 130 times smaller than stainless steel. The morphologies of the samples after corrosion at different stages were observed by scanning electron microscopy （SEM）, and composition and chemical states of elements in passive film were examined by X-ray photoelectron spectroscopy （XPS）. The results demonstrated that the uniform corrosion behavior and formation of Cr-enriched protective surface film are responsible for the high corrosion resistance of this alloy in these acute acid solutions.

关 键 词：铁基块体非晶 强酸溶液 耐腐蚀性能 钝化膜 

分 类 号：TG139.8[一般工业技术—材料科学与工程]