海洋用低合金钢中合金元素作用的研究——(一)合金元素对低合金钢在海水中的腐蚀电位的影响

金属学报

1979, Vol. 15

Issue (2): 215-226

论文

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海洋用低合金钢中合金元素作用的研究——(一)合金元素对低合金钢在海水中的腐蚀电位的影响

上海钢铁研究所中国科学院、长春应用化学研究所金属腐蚀组

THE BEHAVIOUR OF ALLOYING ELEMENTS IN MARINE LOW-ALLOY STEELS I. THE INFLUENCE OF ALLOYING ELEMENTS ON THE CORROSION POTENTIAL OF LOW-ALLOY STEELS IN ARTIFICIAL SEAWATER

Joint Res. Gp. of Corrosion; Shanghai Institute of Iron and Steel Research & Changchun Institute of Applied Chemistry; Academia Sinica

引用本文:

上海钢铁研究所中国科学院、长春应用化学研究所金属腐蚀组. 海洋用低合金钢中合金元素作用的研究——(一)合金元素对低合金钢在海水中的腐蚀电位的影响[J]. 金属学报, 1979, 15(2): 215-226.
. THE BEHAVIOUR OF ALLOYING ELEMENTS IN MARINE LOW-ALLOY STEELS I. THE INFLUENCE OF ALLOYING ELEMENTS ON THE CORROSION POTENTIAL OF LOW-ALLOY STEELS IN ARTIFICIAL SEAWATER[J]. Acta Metall Sin, 1979, 15(2): 215-226.

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摘要: 文中就8种合金元素对海洋用低合金钢(合金总量≤3％)的静态和动态的稳定腐蚀电位进行了析因研究。差方分析结果表明,元素对静态和动态的稳定腐蚀电位具有复杂的影响关系;效应的大小与方向同钢中合金元素的搭配、含量以及环境状态等有密切关系。在30℃自然供氧的静态条件下,强烈影响腐蚀电位正移的元素有Cr,Mo;Ni,Cu则视析因组合的不同而有程度上的差异;元素硅只在高量情况下产生正移的主效应,而在中、低量情况下却出现负移主效应,此时,显著的交互效应有Cr·Mo,Co·Al,Ni·Cu,Cr·Ni和Si·Cr,Si·Mo等,其中多数呈现正移的交互效应。在30℃剧烈通气(5—61/min)的条件下,强烈影响腐蚀电位正移的元素则为Mo,Ni,Cu,其次为铬,元素铝的作用主要以Cr·Al的交互效应体现,而硅则无论取低、中或高量,主效应均可忽略;与静态条件相比显著不同的特点是动态条件下元素的交互效应上升为更显要的地位,特别是Cr·Ni·Mo,Cr·Ni·Cu以及Si·Mo的交互效应。值得指出的是:(1)以钒代铌作为强化元素,对静、动态的稳定腐蚀电位均无显著影响;(2)利用Cr·Al的交互效应或以〈Cr-Al〉作为一个复会因子添加是促使低合金钢静、动态稳定电位强烈正移的有效途径。

Abstract：The effect of alloying elements such as Cr, Mo, Ni, Cu, Si, Al, V and Nbon stable corrosion potentials of low-alloy steels in artificial sea water at 30℃with or without aerating has been studied by variance analysis. Under non-aerat-ing static conditions, Cr or Mo caused the corrosion potential of steel towards posi-tive direction. The effect of Ni and Cu was similar to Cr and Mo, although tosome extent differed with different factorial experimental specimens. Positive mov-ing was observed when Si content in the steel was about 1%, but it changed tonegative with Si<0.5%. The joint effect of two elements as Cr and Mo, Crand Al, Ni and Cu, Cr and Ni, Si and Cr, Si and Mo etc. was such that posi-tive moving was generally observed. Under conditions of violent blowing air, el-ements which very markedly shifted the corrosion potential to positive directionappeared to be Mo, Ni and Cu, and with Cr somewhat to lesser extent. The effectof Al upon corrosion potential was marked only in the simultaneous presence ofCr. But this was not the case with Si, and its effect was negligible irrespectiveof its content. It would appear that the mutual interaction of alloying elements,particlularly with such combinations as Cr and Ni and Mo, Cr and Ni and Cu, Siand Mo etc., produced greater effect on corrosion potentials in aerated than inunaerated conditions, but such a difference was not observed when V is substitut-ed by Nb. Cr-Al was a compound agent appropriated for shifting the corrosionpotential towards positive direction.

收稿日期: 1979-02-18

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