PFOA/硅烷偶联剂分子自组装膜对环氧带锈涂层性能影响

doi:10.11902/1005.4537.2016.214

中国腐蚀与防护学报

2017, Vol. 37

Issue (6): 554-560 DOI: 10.11902/1005.4537.2016.214

研究报告

本期目录 | 过刊浏览

PFOA/硅烷偶联剂分子自组装膜对环氧带锈涂层性能影响

左银泽, 陈亮, 冯清, 高延敏(

)

江苏科技大学材料科学与工程学院镇江 212003

Effect of Self-assembly Film of PFOA/Silane Coupling Agent on Properties of Epoxy Rust-tolerant Coating Applied on Q235 Carbon Steel

Yinze ZUO, Liang CHEN, Qing FENG, Yanmin GAO(

)

School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China

全文: PDF(3320 KB) HTML

摘要:

使用全氟辛酸铵 (PFOA) 和KH550、KH560两种硅烷偶联剂的混合溶液对Q235钢表面进行预处理,明确PFOA/KH550、PFOA/KH560两种溶液在基材表面成膜,并对表面预处理钢进行接触角、CuSO₄点滴实验、极化曲线测试,然后在表面涂覆环氧涂料,通过对环氧涂层进行基本性能测试和电化学极化曲线实验,考察这两种表面处理剂在金属基材表面附着对环氧带锈涂层性能的影响。结果表明：经过PFOA/KH550和PFOA/KH560处理过的带锈表面的接触角分别增加了17.2%和11.7%,CuSO₄点滴实验的时间分别提高了64.7%和38.8%,腐蚀电流分别降低了93.5%和78.7%。不同环氧涂层的测试结果表明：PFOA/KH550混合溶液处理的带锈表面的环氧带锈涂层效果最好,各项性能明显提升,其中附着力和耐冲击强度分别提升14.3%和11%,腐蚀电流比原锈层表面涂层降低96.2%,耐盐水浸泡62 d无明显变化。

关键词 ：表面处理, 硅烷偶联剂, 全氟辛酸铵, 带锈涂层, 腐蚀

Abstract：

Mixed solutions of perfluorooctanoic acid (PFOA) with silane coupling agents KH550 and KH560 respectively were used to pre-treat the surface of carbon steel Q235 and then the effect of the two surface treatment agents on the properties of the applied epoxy coatings was studied by means of FT-IR, SEM with EDS, as well as polarization curve measurement, contact angle measurement and dropping corrosion test with CuSO₄ solution. Results show that the performance of the steel treated with PFOA/KH550 and PFOA/KH560 has been improved. Firstly, contact angle increased by 17.2% and 11.7% respectively. Then the time for corrosion occurrence during dropping corrosion test was increased by 64.7% and 38.8% respectively. Finally, corrosion current was reduced by 93.5% and 78.7% respectively. The performance of the epoxy coating applied on the rust steel surface treated with PFOA/KH550 was significantly improved, i.e. the adhesion and impact strength were increased by 14.3% and 11% respect tively, and corrosion current decreased by 96.2% compared with those of the coating applied on the as received rust steel surface. Besides, there was no significant change for the above-mentioned coating after 62 d soaking in NaCI solution.

Key words： KEY WARDS surface treatment silane coupling agent PFOA epoxy coating corrosion

收稿日期: 2016-11-04

ZTFLH:

TG17

基金资助:国家自然科学基金 (51075197),江苏省产学研前瞻 (BY2013066-12) 和江苏科技大学研究生创新基金 (YCX11S-24)

作者简介:

作者简介左银泽,男,1992年生,硕士生

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引用本文:

左银泽, 陈亮, 冯清, 高延敏. PFOA/硅烷偶联剂分子自组装膜对环氧带锈涂层性能影响[J]. 中国腐蚀与防护学报, 2017, 37(6): 554-560.
Yinze ZUO, Liang CHEN, Qing FENG, Yanmin GAO. Effect of Self-assembly Film of PFOA/Silane Coupling Agent on Properties of Epoxy Rust-tolerant Coating Applied on Q235 Carbon Steel. Journal of Chinese Society for Corrosion and protection, 2017, 37(6): 554-560.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.214 或 https://www.jcscp.org/CN/Y2017/V37/I6/554

表1 环氧涂层的性能测试方法

图1 Q235钢表面腐蚀产物的SEM像和EDS分析结果

图2 经过PFOA/KH550和PFOA/KH560溶液浸泡后样品表面的SEM像

图3 经PFOA/KH550和PFOA/KH560溶液预处理后样品表面的FI-IR谱

表2 经PFOA/KH550和PFOA/KH560预处理后材料表面的EDS分析结果

图4 未经处理以及经过PFOA/KH550和PFOA/KH560处理的Q235钢表面的极化曲线

表3 不同处理后的Q235钢表面极化曲线拟合腐蚀参数

图5 未经处理以及经过PFOA/KH550和PFOA/KH560处理带锈Q235钢板上环氧涂层表面形貌

表4 环氧有机涂层的基本性能测试结果

图6 未经处理以及经过PFOA/KH550和PFOA/KH560处理的带锈Q235钢表面环氧涂层盐水浸泡62 d后的表面形貌

图7 未经处理以及经过PFOA/KH550和PFOA/KH560处理的试样表面涂层的极化曲线

表5 3种涂层的极化曲线拟合得到的腐蚀参数

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