X70钢在卵石黄泥土中的盐浓差宏电池腐蚀  

Salt Concentration Difference Macrocell Corrosion of X70 Steel in Yellow Pebble Soil

作　　者：费小丹[1,2] 李明齐[2] 蔡铎昌[2] 许红梅[2,3] 

机构地区：[1]西南科技大学国防科技学院,绵阳621010 [2]西华师范大学化学化工学院,南充637002 [3]四川绵阳南山中学,绵阳621000

出　　处：《腐蚀与防护》2009年第2期106-109,共4页Corrosion & Protection

基　　金：四川省科技厅重点资助项目(O4JY029-100)

摘　　要：利用电化学阻抗法和失重法,研究了X70钢在卵石黄泥土中的盐浓差宏电池腐蚀。结果表明:在试验初期高盐土样中X70钢为宏电池阳极,而在第5天发生极性逆转;宏电池阴阳极面积比增大,宏电池阳极的腐蚀速率也增大;随着试验时间的增加,自然埋藏在卵石黄泥土中的X70钢的腐蚀速率逐渐减小,而宏电池阳极一直保持着相当高的腐蚀速率。Salt concentration difference macrocell corrosion of X70 steel in yellow pebble soil was studied by means of EIS and weight loss method. It was found that during the early period of the experiment, the sample in soil with high salt content served for the anode of the macrocell, while the polarity of the macrocell reversed after 5 days. The corrosion rate of the anode increased when the area ratio of the cathode to the anode increased. The corrosion rate of X70 steel buried naturally in yellow pebble soil decreased and that of the anode was always rather high with incease of the experimental time.

关 键 词：X70钢 卵石黄泥土 宏电池 电化学阻抗谱(EIS) 

分 类 号：TG172.4[金属学及工艺—金属表面处理]