海上换流站用<strong>DH460</strong>钢盐雾腐蚀及陶瓷涂层防护

doi:10.11902/1005.4537.2025.233

中国腐蚀与防护学报

2026, Vol. 46

Issue (4): 1257-1268 CSTR: 32134.14.1005.4537.2025.233 DOI: 10.11902/1005.4537.2025.233

研究报告

本期目录 | 过刊浏览

海上换流站用DH460钢盐雾腐蚀及陶瓷涂层防护

王流火¹, 孙强¹, 祁含¹, 胡苏凯¹, 叶欢欢¹, 刘家含², 汪大洋³, 张涛²(

)

^1.广东电网有限责任公司广州 510699
^2.广州大学物理与材料科学学院广州 510006
^3.广州大学土木与交通工程学院广州 510006

Salt Spray Corrosion of DH460 Steel for Offshore Converter Stations and Protectiveness of Ceramic Coatings

WANG Liuhuo¹, SUN Qiang¹, QI Han¹, HU Sukai¹, YE Huanhuan¹, LIU Jiahan², WANG Dayang³, ZHANG Tao²(

)

^1.Guangdong Power Grid Co. Ltd., Guangzhou 510699, China
^2.School of Physics and Materials, GuangZhou University, Guangzhou 510006, China
^3.School of Civil and Transportation Engineering, GuangZhou University, Guangzhou 510006, China

引用本文:

王流火, 孙强, 祁含, 胡苏凯, 叶欢欢, 刘家含, 汪大洋, 张涛. 海上换流站用DH460钢盐雾腐蚀及陶瓷涂层防护[J]. 中国腐蚀与防护学报, 2026, 46(4): 1257-1268.
Liuhuo WANG, Qiang SUN, Han QI, Sukai HU, Huanhuan YE, Jiahan LIU, Dayang WANG, Tao ZHANG. Salt Spray Corrosion of DH460 Steel for Offshore Converter Stations and Protectiveness of Ceramic Coatings[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(4): 1257-1268.

全文: PDF(26711 KB) HTML

摘要:

针对海上风电换流站用DH460钢的盐雾腐蚀性能及陶瓷涂层防护效果开展研究，通过中性盐雾加速腐蚀实验模拟服役工况腐蚀环境，利用扫描电子显微镜及其配备的能谱仪、X射线衍射仪、电化学与拉伸性能以及疲劳测试等手段，结合腐蚀产物元素分析，探究DH460钢的腐蚀机理和腐蚀特性。研究表明，腐蚀诱导的晶间/晶界脆性断裂导致结构力学性能降低。基于盐雾-力学耦合实验的研究，揭示了DH460钢的腐蚀疲劳寿命规律，构建了“腐蚀产物膨胀应力-晶界裂纹协同作用”的失效模型。通过设计构建DH460表面复合陶瓷涂层，大幅度提升了材料的抗盐雾腐蚀性能，在实验室参数范围内，腐蚀前后DH460钢性能和结构没有变化，说明陶瓷涂层彻底阻断了腐蚀元素进入钢基底。

关键词 ： DH460钢, 盐雾腐蚀, 腐蚀机理, 防腐涂层

Abstract：

In this paper, the salt spray corrosion resistance of DH460 steel for offshore wind power converter stations and the protective effects of ceramic coatings were investigated via neutral salt spray accelerated corrosion tests as a simulation of the realcorrosion environments in service. The tested samples and the formed corrosion products were characterized by means of scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD), electrochemical testing, tensile testing, and fatigue testing etc. The results reveal that corrosion-induced intergranular brittle fracture reduces the mechanical properties of the steel. Based on the salt spray-mechanistic coupling test, the fatigue life of DH460 steel after salt spray test was revealed, and a failure model of “synergistic effect of corrosion product expansion stress grain boundary crack” was constructed. By designing and constructing a composite ceramic coating on the surface of DH460 steel, the resistance to salt spray corrosion of the DH460 steel has been significantly improved by the applied composite ceramic coating. Within the laboratory parameter range, no change was observed in the performance and structural integrity of the DH460 steel before and after corrosion test, indicating that the ceramic coating can completely block the entry of corrosive substances upon the steel substrate.

Key words： DH460 steel salt spray corrosion corrosion mechanism anti-corrosion coating

收稿日期: 2025-07-21 32134.14.1005.4537.2025.233

ZTFLH:

TG174

基金资助:南方电网公司基建新技术研究项目(031751WD24050008)

通讯作者: 张涛，E-mail：zhangtao@gzhu.edu.cn，研究方向为先进金属材料设计制备及防腐性能

Corresponding author: ZHANG Tao, E-mail: zhangtao@gzhu.edu.cn

作者简介: 王流火，男，1985年生，硕士，高级工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.233 或 https://www.jcscp.org/CN/Y2026/V46/I4/1257

图1 拉伸试样的形状和尺寸

图2 DH460钢腐蚀不同时间后的表面形貌图

图3 DH460钢腐蚀前后表面形貌

图4 DH460钢腐蚀前后的XRD谱

图5 DH460钢经5%NaCl盐雾腐蚀10 d后的SEM照片

图6 DH460钢腐蚀后EDS元素分布分析

图7 DH460钢腐蚀后截面SEM微观形貌

图8 DH460钢腐蚀产物SEM微观形貌及对应位置线扫描

图9 腐蚀前后应力-应变性能对比图及屈服强度和延伸率随腐蚀时间演化

图10 腐蚀后拉伸断口形貌图

图11 不同腐蚀时间下样品的失重率

图12 DH460钢的循环应力响应(S-N)曲线

图13 DH460钢腐蚀前后电化学分析图

图14 涂层防护DH460钢腐蚀前后微观形貌及对应区域线扫描

图15 DH460钢腐蚀前后表面粗糙度对比

图16 腐蚀深度及腐蚀产物高度对比

图17 有无涂层DH460钢样品腐蚀后摩擦磨损轨迹的三维形貌图与显微图像

图18 有无涂层的DH460钢样品腐蚀前后磨损磨痕对比

图19 3种试样室温拉伸曲线和涂层防护DH460钢腐蚀10 d后的试样拉伸断口形貌

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