铅、锌氯化物共存条件下1Cr18Ni9Ti不锈钢高温腐蚀机理
详细信息 查看官网全文
- 英文论文题名：High Temperature Corrosion Mechanism of 1Cr18Ni9Ti Induced by ZnCl_2 and PbCl_2
- 论文作者：唐灿 ; 刘春雨
- 英文论文作者：Tang Can ; Liu Chunyu ; Institute of Materials ; China Academy of Engineering and Physics
- 年：2016
- 作者机构：中国工程物理研究院材料研究所;
- 论文关键词：1Cr18Ni9Ti ; 氯化锌 ; 氯化铅 ; 腐蚀
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十六分会：燃烧化学
- 语种：中文
- 分类号：TG174.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十六分会 ; 燃烧化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：104k
- 原文格式：D
- 会议级别：全国
摘要
在废物焚烧领域,烟气中的氯化物通常会导致金属材料严重腐蚀,基于此,本文研究了氯化锌、氯化铅以及两种氯盐的混合物对常见金属材料—1Cr18Ni9Ti不锈钢的高温腐蚀机理。通过增重实验分析了腐蚀程度的强弱,在蒸气腐蚀条件条件下,腐蚀程度强弱为氯盐混合物>氯化锌>氯化铅,其原因在于混合氯盐条件下,其原因在于氯化锌饱和蒸气压大于氯化铅饱和蒸气压;而在盐膜腐蚀条件下,氯化锌摩尔比为80%时腐蚀程度最强,其原因在于两种氯盐形成了低熔点共晶盐,导致了熔盐腐蚀。通过表面分析和截面分析,发现氯化物与金属表面的氧化物反应生成了尖晶石物质,破坏了表面氧化膜,从而导致金属的腐蚀。
In the field of waste incineration, chlorides in flue gas often lead to serious corrosion of metallic materials, in this context, high temperature corrosion mechanism of a kind of a common metallic material-1Cr18Ni9 Ti induced by ZnCl_2, PbCl_2 and ZnCl_2-PbCl_2 mixture was investigated in this paper. The corrosion degree was studied by mass gain experiments. In the chlorides vapor corrosion experiments, the corrosion degree could be concluded that ZnCl_2-PbCl_2 mixture >ZnCl_2>PbC l_2 for the higher saturated vapor pressure of ZnCl_2 than PbCl_2. Meanwhile, the partial vapor of chlorides of ZnCl_2-PbCl_2 mixture was higher than ZnCl_2 and PbCl_2. In the chlorides salt film corrosion experiments, the most serious corrosion was measured when the mole fraction of ZnCl_2 is 80%, for the reason that the two kinds of chloride salt formed low melting point eutectic salt then caused molten salt corrosion. By surface and cross-section analysis, the corrosion mechanism can be concluded that chlorides reacted with the oxidization film on the metal surface to generate spinel structure material. Thus, the oxidization film on the metal surface was undermined, resulting in the corrosion of metallic materials.
In the field of waste incineration, chlorides in flue gas often lead to serious corrosion of metallic materials, in this context, high temperature corrosion mechanism of a kind of a common metallic material-1Cr18Ni9 Ti induced by ZnCl_2, PbCl_2 and ZnCl_2-PbCl_2 mixture was investigated in this paper. The corrosion degree was studied by mass gain experiments. In the chlorides vapor corrosion experiments, the corrosion degree could be concluded that ZnCl_2-PbCl_2 mixture >ZnCl_2>PbC l_2 for the higher saturated vapor pressure of ZnCl_2 than PbCl_2. Meanwhile, the partial vapor of chlorides of ZnCl_2-PbCl_2 mixture was higher than ZnCl_2 and PbCl_2. In the chlorides salt film corrosion experiments, the most serious corrosion was measured when the mole fraction of ZnCl_2 is 80%, for the reason that the two kinds of chloride salt formed low melting point eutectic salt then caused molten salt corrosion. By surface and cross-section analysis, the corrosion mechanism can be concluded that chlorides reacted with the oxidization film on the metal surface to generate spinel structure material. Thus, the oxidization film on the metal surface was undermined, resulting in the corrosion of metallic materials.
引文