Investigation on the effectiveness of the repair method 8.3 “Corrosion protection by increasing the electrical resistivity” in chloride‐containing concrete Part 3: The influence on corrosion of chloride‐contaminated concretes under protective coatings

摘要

Abstract > With the implementation of the repair method “increasing the electrical resistivity by coating” (MR 8.3), no direct repassivation of the reinforcing steel is initially intended. The success of the repair is rather linked to the change of the corrosion‐relevant parameters over time. These include an increase in the concrete resistivity due to dehydration and gradual decrease in corrosion currents and driving voltages on the reinforcing steel. Within the scope of a research project funded by the German Research Foundation (DFG), application limits for the repair principle W‐Cl could be defined. The chloride content present in the concrete at the rebar is the significant limiting factor for the application. While the corrosion activity even with moderately dehydrated specimens under diffusion‐retarding coatings at chloride contents of 1?wt% Cl ? /c is in the range of the passive current density, this cannot be generally determined for chloride contents of 2?wt% Cl ? /c. The type of coating has a decisive influence on the dehydration of the concrete. For example, less dense concretes under a permeable coating (acrylic dispersion/OS 4) can dry out to such an extent that the passive current density is reached. With semipermeable coatings and the presence of high chloride contents of 2?wt% Cl ? /c, the repair principle W‐Cl does not lead to success according to the available test results. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 随着修复方法的实施“通过涂层增加电阻率”（8.3），最初没有直接回原料的加强钢。修复的成功与随着时间的推移相当与腐蚀相关参数的变化相关联。这些包括由于脱水和耐腐蚀电流的逐渐减小和增强钢上的驱动电压而增加的混凝土电阻率增加。在由德国研究基金会（DFG）资助的研究项目范围内，可以定义修复原理W-CL的应用限制。钢筋在混凝土中存在的氯化物含量是应用的重要限制因素。虽然腐蚀活动甚至在氯化物含量为1〜wt％Cl的氯化物含量下的扩散延迟涂层中的中间脱水标本。？</ sup> / c处于无源电流密度的范围内，通常不能用于2〜wt％CL的氯化物含量？</ sup> /C。涂层类型对混凝土的脱水具有决定性的影响。例如，在可渗透涂层（丙烯酸分散/ OS 4）下的较少致密的混凝土可以在达到被动电流密度的情况下干燥。具有半透涂层和氯化物含量的含量为2〜wt％？</ sup> / c，修复原理W-CL根据可用的测试结果不会导致成功。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-24514/'>《Materials and Corrosion》</a> <b style="margin: 0 2px;">|</b><span>2020年第5期</span><b style="margin: 0 2px;">|</b><span>共10页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/7194.html" title="金属腐蚀与保护、金属表面处理">金属腐蚀与保护、金属表面处理;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=chloride&option=203" rel="nofollow">chloride;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=concrete resistivity&option=203" rel="nofollow">concrete resistivity;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=corrosion&option=203" rel="nofollow">corrosion;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=durability&option=203" rel="nofollow">durability;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=repair&option=203" rel="nofollow">repair;</a> </p> <div class="translation"> 机译：氯化物;混凝土电阻率;腐蚀;耐久性;修理; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/academic-journal-cn_marine-science-bulletin_thesis/0201252532561.html">溢油污染对海洋生态的影响及修复方法研究</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=贾婷婷&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">贾婷婷,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=高燕&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">高燕,</a> 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