净水技术2024，Vol.43Issue(z1)：37-48,12.DOI:10.15890/j.cnki.jsjs.2024.s1.006
不锈钢供水管材的土壤外腐蚀特性试验
Experiment of Soil External Corrosion Characteristics for Stainless Steel Pipeline Materials of Water Supply
摘要
Abstract
The chloride ion(Cl-)and moisture ofthe latosol were selected to investigatethe external corrosion behaviors of three types of stainless steel,304,304L,316L.The results revealed that 316L stainless steel exhibited strong resistance of environmental erosion,304L followed and 304 the worst in latosol no matter in the concentrations of Cl-and moisture.Particularly,when experimental latosol contained Cl-from 10 mg/kg to 1 250 mg/kg,the increments of corrosion current(ΔIcorr低)of the three types of stainless steel appeared obviously,where 304L＞316L＞304.When the concentration of Cl-varied from 1 250 mg/kg to 2 500 mg/kg,the relative lower increments of ΔIcorr高 were obtained,where 304L＞304＞316L,indicating that the soil environment with low Cl-promoted corrosion and high Cl-suppressed corrosion.Additionally,when the moisture of latosol was changed from 5％to 35％,the ΔIcorr values of three type stainless steel ordered by 304L＞316L＞304.When the moisture of soil increases from 15％to 25％,Icorr varied more obviously,and 304L＞316L＞304,indicating that moisture was conducive to improve corrosion progresses of the buried stainless steel under a certain range.关键词
供水管道/不锈钢/土壤外腐蚀/动电位极化曲线/电化学阻抗谱Key words
water supply pipeline/stainless steel/soil external corrosion/potentiodynamic polarization curve/electrochemical impedance spectroscopy分类
建筑与水利引用本文复制引用
温朵,李伟英,宋欣,迟冉,熊清华,罗晓静..不锈钢供水管材的土壤外腐蚀特性试验[J].净水技术,2024,43(z1):37-48,12.基金项目
国家"十四五"重点研发计划项目(2021YFC3201304) （2021YFC3201304）
福州市供水系统水质稳定特性及对策研究(kh0040020203000) （kh0040020203000）
江苏银羊不锈钢管业有限公司企业项目(20202847) （20202847）
