低合金钢在海洋各腐蚀区带的锈层研究  

STUDY ON RUST LAYERS ON LOW ALLOY STEEL IN VARIOUS MARINE CORROSION ZONE

作　　者：李言涛[1] 李延旭[1] 侯保荣[1] 张经磊[1] 

机构地区：[1]中国科学院海洋研究所,青岛266071

出　　处：《海洋与湖沼》1998年第6期651-655,共5页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金!49476288

摘　　要：1995年5月通过对低合金钢——16Mn钢在埕岛海区挂片两年（1992年10月－1994年10月）的腐蚀产物的穆斯堡尔诺测定，研究了低合金钢在飞溅区、潮差区、全没区和海泥区四个不同海洋腐蚀区带的锈层组成和含量。锈层中的FeOOH和Fe3O4的不同含量说明了内锈层中的β－FeOOH为氧化剂参与了阴极作用，加速了干湿交替区低合金钢的腐蚀。另外由于16Mn钢的合金元素的影响，基体表面锈层组成简单，结构致密，形成良好的阻挡层，减缓了钢铁的腐蚀速度。In May 1995, Mossbauer Spectroscopies for cormsion substances formed on a low alloy(16Mn) steel, exposed in Chengclao sea area for 2 year from DeL 1992 to Cct 1994, were derived.The phase composihon and content of the rust layers on the 16Mn steel in four different mdrinccormsion zones (i. e. splash zone, hde zone, seawater zone and seamud zone) were analyzed andstUdied. In every corrosion zone, the rust layer of the 16Mn steel is maiuly composed of four kindsof chewhcal composihons including α－Fe3O4(A), α－Fe3O4(B), β－FeOOH and a－FeO. β－FeOOH is thedondnant composihon, which is a typical cormsion substance of steel in marine environinnts. Thedifferent contentS of β－FeooH and a－Fe3O4 in rust layers illustrate that β－FeOOH in the inner rustlayer is involved in the cathodic process as the oxidanL eccelerahng the cormsion of the low alloysteel under wet/ dry cycle conditions. on the other hand, for the alloy elements in the 16Mn steel,the rust layers with simple composition and fine and close textures form a good barrier layer,lowering the corrosion rate of steel and increasing the resistance of the 16Mn steel against marinecormsion.

关 键 词：低合金钢 海洋腐蚀 锈层 穆斯堡尔谱 合金金 

分 类 号：TG172.5[金属学及工艺—金属表面处理]