Fe-Cr-Ni合金碱性SCC的电化学预测方法

CORC > 厦门大学 > 2003年第9卷

	Fe-Cr-Ni合金碱性SCC的电化学预测方法; An Electrochemical Prediction Method for Caustic SCC of Fe-Cr-Ni Alloy
	黄春波 ; 吕战鹏 ; 杨武 ; HUANG Chun_bo ; LU Zhan_peng ; YANG Wu
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract9075.shtml
	2003-08-28
关键词	Fe_Cr_Ni合金(800M) 稳态溶解电流密度极化溶解敏感指数碱性SCC 电化学预测 Fe_Cr_Ni alloy Steady dissolution current Polarization dissolution susceptibility parameter Caustic stress corrosion cracking Electrochemical prediction
英文摘要	应用动电位扫描研究了Fe_Cr_Ni合金 (80 0M)C形环在含硫代硫酸钠杂质的热浓碱溶液中的应力腐蚀破裂 (SCC)行为 .测量了 80 0M合金试片与C形环试样恒电位极化时的稳态溶解电流ist,据此绘制了简化模拟“稳态”恒电位极化曲线 ,并将该极化曲线的ist与低电位下的稳态钝化电流ip之比 (RPD=ist/ip)定义为极化溶解敏感指数 .发现 80 0M合金C形环发生碱性SCC的电位区 (E =- 30～ 4 0mV)处于慢扫阳极极化曲线的钝化区 ,并对应于快扫极化曲线的钝化_过钝化溶解转变区 ;在该敏感电位区 ,试片与C环形试样的ist位于简化的模拟稳态恒电位极化曲线的过钝化区 ,试片与C形环试样两者的极化溶解敏感指数值很接近 (分别为 2 .5 5～ 7.0 3和 2 .5 2～ 6 .0 0 ) .综合稳态溶解电流密度 ,极化溶解敏感指数等有关信息 ,提出了一种碱性SCC的电化学预测方法; Stress corrosion cracking (SCC) of Fe_Cr_Ni alloy (alloy 800 M) in hot concentrated caustic solution was investigated by means of tests of C_rings under controlled potentials. The steady dissolution current densities( i st ) of the plate specimens and C_rings polarized potentiostatically were measured. The simplifed steady potentiostatical curves were drawn on the basis of i st . The ratio R PD measured from i st and steady passive current density i p at low potentials ( R PD = i st / i p ) was designed as a polarization dissolution susceptibility parameter. The parameter R PD values of both plate and C_ring specimens were similar to SCC sensetive potentials of C_rings between-30 mV/SCE and 40 mV/SCE. An Electrochemical prediction method for caustic SCC was proposed basd on the electrochemical characters synthesizing i st and R PD .; 作者联系地址：上海材料研究所,上海材料研究所,上海材料研究所上海200437 ,上海200437 ,上海200437; Author's Address: Shanghai Research Institute of Materials. Shanghai 200437, China
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/57732]
专题	2003年第9卷
推荐引用方式 GB/T 7714	黄春波,吕战鹏,杨武,等. Fe-Cr-Ni合金碱性SCC的电化学预测方法, An Electrochemical Prediction Method for Caustic SCC of Fe-Cr-Ni Alloy[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract9075.shtml,2003.
APA	黄春波,吕战鹏,杨武,HUANG Chun_bo,LU Zhan_peng,&YANG Wu.(2003).Fe-Cr-Ni合金碱性SCC的电化学预测方法.http://electrochem.xmu.edu.cn/CN/abstract/abstract9075.shtml.
MLA	黄春波,et al."Fe-Cr-Ni合金碱性SCC的电化学预测方法".http://electrochem.xmu.edu.cn/CN/abstract/abstract9075.shtml (2003).