刘雨薇,曹公望,王振尧,曹岩,蒋双优,王磊.镀锌钢在红沿河大气环境中的腐蚀行为[J].表面技术,2016,45(3):152-157.
LIU Yu-wei,CAO Gong-wang,WANG Zhen-yao,CAO Yan,JIANG Shuang-you,WANG Lei.Atmospheric Corrosion of Galvanized Steel at Hongyanhe Nuclear Power Station[J].Surface Technology,2016,45(3):152-157 |
| 镀锌钢在红沿河大气环境中的腐蚀行为 |
| Atmospheric Corrosion of Galvanized Steel at Hongyanhe Nuclear Power Station |
| 投稿时间：2015-09-20 修订日期：2016-03-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.03.025 |
| 中文关键词: 大气腐蚀 镀锌钢 红沿河核电站 Cl- SO2 形貌分析 |
| 英文关键词:atmospheric corrosion galvanized steel Hongyanhe nuclear power station Cl- SO2 morphological analysis |
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| Author | Institution |
| LIU Yu-wei | Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China |
| CAO Gong-wang | Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China |
| WANG Zhen-yao | Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China |
| CAO Yan | Liaoning Hongyanhe Nuclear Power Co. Ltd, Dalian 116319, China |
| JIANG Shuang-you | Liaoning Hongyanhe Nuclear Power Co. Ltd, Dalian 116319, China |
| WANG Lei | Liaoning Hongyanhe Nuclear Power Co. Ltd, Dalian 116319, China |
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| 中文摘要: |
| 目的 研究镀锌钢在红沿河地区SO2和Cl-含量较高的大气环境中的腐蚀行为与机理。方法 根据GB/T 6464—1997将制备好的试样在红沿河核电厂进行现场暴晒试验,分别在暴晒4,12,18,24个月后取回试样。利用质量损失,X 射线衍射(XRD)和扫描电镜(SEM)分析技术,对暴晒后的试样进行腐蚀产物观察与分析。 结果 质量损失结果表明,镀锌钢腐蚀失重随暴晒时间的延长呈线性增加。XRD分析结果表明,随着暴晒时间的延长,锌镀层表面形成的腐蚀产物成分变化不大,以Zn12(SO4)3Cl3(OH)15.5H2O和6Zn(OH)2.ZnSO4.4H2O为主。SEM结果表明,腐蚀产物随着暴晒时间的延长逐渐增加,产物形貌略有变化,但都以球状和针状为主。从截面分析来看,暴晒18个月时,腐蚀产物分为双两层,内层致密,外层疏松。暴晒24个月时,腐蚀产物厚度稍有增加,疏松层向致密层转变。结论 镀锌钢在红沿河地区的大气腐蚀属于较严重的级别,SO2与Cl-为促进腐蚀过程的主要影响因子。镀锌钢表面形成的腐蚀产物对锌镀层的保护作用较差。 |
| 英文摘要: |
| Objective To study the atmospheric corrosion of galvanized steel at Hongyanhe nuclear power station with high SO2 concentration and high Cl- concentration. Methods The galvanized steel was exposed at Hongyanhe atmospheric environment for 4, 12,18 and 24 months, according to GB/T 64-1997. The corrosion behavior of galvanized steel after explosion was investigated by corrosion mass loss test, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Results The results of corrosion kinetics analysis show that the galvanized steel corrosion weight loss is linear increase with the increase of the exposure time. XRD analysis results show that with the extension of exposure time, zinc coating on the surface of the formation of the corrosion product composition didn’t change much, which were mainly Zn12(SO4)3Cl3(OH)15•5H2O and 6Zn(OH)2•ZnSO4•4H2O. SEM results show that the corrosion products with the extension of exposure time increases gradually, the product morphology changes slightly, with ball and needle. From the point of cross section analysis, after 18 months, corrosion products were divided into two layers, while after 24 months, the thickness of the corrosion products increases slightly, loose layer transformed into dense layer. Conclusion SO2 and Cl- are the main factors that influence the corrosion process. The corrosion products formed on the surface of galvanized steel have certain protective effect. |
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