掺水集输多因素腐蚀环境中20钢的腐蚀行为  

Corrosion Behavior of 20 Steel in Multi-Factor Corrosion Environment of Water Gathering and Transportation

作　　者：常铭 王菁 殷新田 王瑟 王玉博 潘景亚 李轩鹏 CHANG Ming;WANG Jing;YIN Xintian;WANG Se;WANG Yubo;PAN Jingya;LI Xuanpeng(PetroChina Dagang Oilfield Company,Tianjin 300456,China;State Key Laboratory of Oil and Gas Equipment,CNPC Tubular Goods Research Institute,Xi'an 710077,China)

机构地区：[1]中国石油天然气股份有限公司大港油田分公司,天津300456 [2]中国石油集团工程材料研究院有限公司油气钻采输送装备全国重点实验室,西安710077

出　　处：《腐蚀与防护》2025年第2期22-28,共7页Corrosion & Protection

基　　金：宁波市科技创新2025重大专项(2020Z108)。

摘　　要：采用响应曲面法(RSM)研究了掺水集输多因素腐蚀环境中20钢的腐蚀行为。通过设计试验,构建了温度、溶氧含量、硫酸盐还原菌(SRB)含量、H_(2)S含量等因素及其耦合与腐蚀电流密度(J_(corr))之间的定量关系,通过方差分析确定了模型和各因素的显著性。结果表明:温度、溶氧含量、SRB含量、温度与溶氧含量耦合、温度与SRB含量耦合、SRB含量和溶氧含量耦合对腐蚀电流密度影响显著,但是当H_2S质量分数在0~529mg/kg范围内时H_(2)S含量以及其与其他因素的耦合影响不显著;P_(areto)权重分析显示各单一因素及耦合因素对腐蚀电流密度影响从大到小排列依次为:温度(64.90%)、溶氧含量(15.27%)、温度和溶氧含量耦合(9.39%)、温度和SRB含量耦合(5.29%)、SRB含量(2.67%)、SRB含量和溶氧含量耦合(2.30%)。The corrosion behavior of 20 steel in multi-factor corrosion environment of water gathering and transportation was studied by means of response surface method(RSM).The quantitative relationship of corrosion current density(Jcorr)with temperature,dissolved oxygen concentration,SRB concentration,H_(2)S concentration and their coupling effects was established through designed experiments.Meanwhile,the significance of the model and each factor was analyzed by means of analysis of variance.The results show that the temperature,dissolved oxygen concentration,SRB concentration,coupling of temperature and SRB concentration,coupling of SRB concentration and dissolved oxygen concentration had significant effects on the corrosion current density.However,the H_(2)S concentration and its coupling with other factors had no significant effects when the mass fraction of H2S was in the range of 0-529 mg/kg.Pareto weight analysis displayed that the effects of single factors and coupling factors on the corrosion current density from large to small were:temperature(64.90%),dissolved oxygen concentration(15.27%),coupling of temperature and dissolved oxygen concentration(9.39%),coupling of temperature and SRB concentration(5.29%),SRB concentration(2.67%),coupling of SRB concentration and dissolved oxygen concentration(2.3%).

关 键 词：多因素腐蚀环境 20钢 响应曲面法(RSM) 方差分析 权重分析 

分 类 号：TG172[金属学及工艺—金属表面处理]