[1]辛公锋,龙关旭,袁阳光,等.高强钢丝两种镀层耐蚀性及点蚀概率模型[J].西安建筑科技大学学报(自然科学版),2023,55(04):616-623.[doi:10.15986/j.1006-7930.2023.04.018 ]
　XIN Gongfeng,LONG Guanxu,YUAN Yangguang,et al.Corrosion resistance and pitting probability models of two kinds of coatings on high strength steel wires[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(04):616-623.[doi:10.15986/j.1006-7930.2023.04.018 ]
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高强钢丝两种镀层耐蚀性及点蚀概率模型()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年04期
页码:
616-623
栏目:
出版日期:
2023-10-26

文章信息/Info

Title:
Corrosion resistance and pitting probability models of two kinds of coatings on high strength steel wires
文章编号:
1006-7930(2023)04-0616-08
作者:
辛公锋1; 2; 龙关旭1; 2; 袁阳光3; 黄平明4; 张泽军1
(1.山东高速集团有限公司创新研究院，山东 济南 250101; 2.山东省高速公路技术和安全评估重点实验室，山东 济南 250101; 3.西安建筑科技大学 土木工程学院，陕西 西安 710055; 4.长安大学 公路学院，陕西 西安 710064)
Author(s):
XIN Gongfeng1; 2;  LONG Guanxu1; 2;  YUAN Yangguang3;  HUANG Pingming4;  ZHANG Zejun1
(1.Shandong Hi-speed Group Co. Ltd., Innovation Research Institute, Jinan 250101, China; 2.Shandong Key Laboratory of Highway Technology and Safety Assessment, Jinan 250101, China; 3.College of Civil Engineering, Xi'an Univ. of Arch. & Tech. Xi'an 710055, China; 4.Chang'an University, Highway College, Xi'an 710064, China)
关键词:
桥梁工程;  高强钢丝;  镀锌层;  Galfan镀层;  耐蚀性;  点蚀概率模型
Keywords:
bridge engineering;  high strength steel wire;  Galvanized coating;  Galfan coating;  corrosion resistance;  pitting corrosion probabilistic model
分类号:
U44
DOI:
10.15986/j.1006-7930.2023.04.018
文献标志码:
A
摘要:
为研究高强钢丝镀锌层及Galfan镀层的耐蚀性,并建立腐蚀全过程点蚀概率模型,开展了中性盐雾加速腐蚀试验.对比分析了两种镀层的均匀腐蚀过程,研究了两种镀层的宏观与微观腐蚀形貌,通过动电位极化曲线测试阐释了两种镀层的耐蚀性,最后,采用三维表面形貌仪扫测腐蚀后镀层表面形貌,建立了腐蚀全过程点蚀概率模型.研究发现:镀锌层与Galfan镀层均匀腐蚀深度随腐蚀时间延长分别呈现线性增长与抛物线增长趋势,镀锌层与Galfan镀层腐蚀全过程宏观腐蚀形貌分别呈现两阶段与三阶段变化特征,黄褐色腐蚀物、红褐色锈斑覆盖钢丝表面约1/3的区域时,可分别判定两种镀层被完全腐蚀; 随着腐蚀时间延长,镀锌层微观腐蚀形貌从初期的致密状态向多空、镂空状演变,Galfan镀层微观腐蚀形貌在前期由致密状态过渡至多空镂空状,进一步演变为层状堆叠状态,Galfan镀层被完全腐蚀时,微观形貌呈松散颗粒状; Galfan镀层的动电位极化曲线存在明显钝化区,且腐蚀时长越短,钝化区越稳定,镀锌层在腐蚀过程中的腐蚀倾向性轻微下降,Galfan镀层的腐蚀倾向性随暴露时间的延长下降较明显; 镀层点蚀概率模型中的区间最大点蚀系数不拒绝Gumbel分布,两种镀层区间最大点蚀系数分布的位置参数及尺度参数均随腐蚀时长的增加呈指数下降趋势.
Abstract:
To investigate the corrosion resistance of Galvanized coating and Galfan coating of high strength steel wires, and establish the pitting corrosion probability model of the whole corrosion process, the accelerated corrosion tests were conducted. The uniform corrosion process of the two coatings was compared, the macroscopic and microscopic corrosion features of the two coatings was studied, and the corrosion resistance of the two coatings was explained by the potentiodynamic polarization curve test. Finally, the surface morphology of the coatings after corrosion was measured by a three-dimensional surface morphometer, and the pitting corrosion probabilistic model of the whole corrosion process was established. It is found that the uniform corrosion depth of Galvanized coating and Galfan coating increases linearly and parabolically with the extension of corrosion time, and the macroscopic corrosion features of Galvanized coating and Galfan coating present two-stage and three-stage variation characteristics, respectively.The Galvanized coating or Galfan coating can be deemed to be corroded entirely when the yellow-brown corrosion substance and red-brown rust spot cover about 1/3 area of the wire surface. With the extension of exposure period, the microscopic corrosion feature of Galvanized coating evolves from the initial dense state to the hollow shape. In the preliminary stage, the microscopic corrosion feature of Galfan coating varies from dense state to hollow shape, and then tends to be stacked. When the Galfan coating is corroded entirely, the microscopic corrosion feature tends to be loss granular. Obvious passivation area can be seen on the potentiodynamic polarization curves of Galfan coating, and the shorter the corrosion time, the more stable the passivation zone. The corrosion tendency of Galvanized coating decreases slightly in the corrosion process, while the corrosion tendency of Galfan coating decreases obviously. According to the developed pitting corrosion probabilistic models, the block maximum pitting factor can be described by Gumbel distribution. For Galvanized coating and Galfan coating, both the location parameter and the scale parameter decrease exponentially with the extension of exposure period.

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备注/Memo

备注/Memo:
收稿日期:2022-11-11修回日期:2023-07-15
基金项目:国家自然科学基金青年科学基金项目(52308200); 陕西省自然科学基础研究计划一般项目-面上基金项目(2023-JC-YB-321); 山东高速集团有限公司科技创新基金项目(严酷环境混凝土梁性能衰减机理与评估方法)
第一作者:辛公锋(1979—)，男，博士，研究员，主要从事基础设施服役性能评估研究.E-mail:gfxin@163.com
通信作者:袁阳光(1991—)，男，博士，讲师，主要从事桥梁结构可靠性评估研究.E-mail:yuanyg31@163.com
更新日期/Last Update: 2023-08-28