带破损氧化石墨烯改性环氧树脂涂层的X80钢在NaCl溶液中的局部腐蚀规律
Localized Corrosion Regularities of X80 Steel Covered with Damaged GO Modified Epoxy Coating in NaCl Solution
摘 要
在环氧树脂涂层中添加2%（质量分数）的氧化石墨烯（GO）对其进行改性，利用电化学阻抗谱（EIS）和扫描开尔文探针技术（SKP），研究在5种NaCl溶液中，X80钢基体上的GO改性涂层破损后的局部腐蚀规律。结果表明：GO的独特片状结构能有效抑制水和氯离子等介质进入改性涂层内；同时，GO对腐蚀介质的阻隔作用将金属腐蚀活动限制在涂层破损处，腐蚀产物堆积并形成保护膜，对金属基体起到了一定的保护作用。
氧化石墨烯改性涂层
局部腐蚀
电化学阻抗谱
扫描开尔文探针
X80 steel
graphene oxide (GO) modified coating
localized corrosion
electrochemical impedance spectroscopy (EIS)
scanning Kelvin probe (SKP)
Abstract
Epoxy coating was modified by adding 2% (mass fraction) graphene oxide (GO). The localized corrosion regularities of X80 steel covered with damaged GO modified epoxy coating in five NaCl solutions were investigated using electrochemical impedance spectroscopy (EIS) and scanning Kelvin probe (SKP) technology. The results show that the unique chip structure of GO could effectively inhibit the media, like H2O and chloride ions, getting into the modified coating. At the same time, due to the blocking function of GO, the corrosive activities were restricted in the defected area, and the accumulation of corrosion products formed a protective film which had a protective effect on the metal substrate.
中图分类号 TG174 DOI 10.11973/fsyfh-201902009
所属栏目 试验研究
基金项目
收稿日期 2017/8/2
修改稿日期
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联系人作者景红(605535335@qq.com)
引用该论文: JING Hong,WANG Di. Localized Corrosion Regularities of X80 Steel Covered with Damaged GO Modified Epoxy Coating in NaCl Solution[J]. Corrosion & Protection, 2019, 40(2): 126
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