ES150型纳米改性有机硅涂料的防护作用及其应用

doi:10.11902/1005.4537.2017.111

中国腐蚀与防护学报

2018, Vol. 38

Issue (4): 373-380 DOI: 10.11902/1005.4537.2017.111

研究报告

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ES150型纳米改性有机硅涂料的防护作用及其应用

徐涛涛¹, 陈祝桥¹, 田卫平¹, 王成²(

), 朱圣龙², 王福会³, 张涛², 陈明辉³

1 航空工业天津航空机电有限公司天津 300308
2 中国科学院金属研究所金属腐蚀与防护实验室沈阳 110016
3 东北大学材料科学与工程学院沈阳 110819

Protective Performance of a Novel Silicone Coating ES150 Modified with Nano-particulate of Metal for AZ91D Mg-alloy

Taotao XU¹, Zhuqiao CHEN¹, Weiping TIAN¹, Cheng WANG²(

), Shenglong ZHU², Fuhui WANG³, Tao ZHANG², Minghui CHEN³

1 AVIC Tianjin Aviation Electro-mechanical Co., Ltd., Tianjin 300308, China
2 Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3 School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

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摘要:

采用物理混合的方法制备了ES150型纳米改性有机硅涂料,并采用电化学阻抗技术、盐雾腐蚀实验和浸泡实验研究了涂层的防腐蚀性能。结果表明,清漆涂层存在大量的微孔,严重影响涂层的防护性能。纳米改性复合涂层的致密度显著提高,经6000 h盐水浸泡和5000 h中性盐雾腐蚀实验,涂层未出现起泡、剥落等破坏,涂层下的基体镁合金未发生腐蚀。在浸泡过程中涂层的阻抗保持在10⁹ Ω·cm²以上,具有优异的耐腐蚀性能。SO₂加速腐蚀实验表明,ES150型纳米复合有机硅涂料实现了对飞机零部件在恶劣环境中的有效防护,实际应用效果显著。

关键词 ：有机硅, 防护涂层, SO₂, 腐蚀

Abstract：

A novel protective coating, namely ES150 silicone modified with nano-particulate of metal was prepared by physical blending process, which was further applied on AZ91D Mg-alloy, and then the corrosion resistance of the coated alloy was evaluated by electrochemical impedance spectroscopy (EIS), immersion test in 3.5% (mass fraction) NaCl solution and neutral salt spray exposure. The results indicated that lots of micropores could be observed within the silicone lacquer coating, which deteriorates its protective efficiency. In contrast, the number of micropores decreased greatly for the modified silicone coatings with nano-particulate of metal. The modified ES150 coatings can withstand 6000 h immersion in 3.5%NaCl solution and 5000 h neutral salt spray exposure without blistering, peeling off or corrosion. The impedance of the coatings is larger than 10⁹ Ω·cm² during immersion in 3.5%NaCl solution. The SO₂ accelerated corrosion experiments revealed that the coatings provide sufficient protectiveness for airplane workpieces.

Key words： organosilion protective coating sulfur dioxide corrosion

收稿日期: 2017-07-06

ZTFLH:

TQ630

基金资助:国家自然科学基金 (51531007)

作者简介:

作者简介徐涛涛,男,1984年生,硕士,工程师

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	徐涛涛
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引用本文:

徐涛涛, 陈祝桥, 田卫平, 王成, 朱圣龙, 王福会, 张涛, 陈明辉. ES150型纳米改性有机硅涂料的防护作用及其应用[J]. 中国腐蚀与防护学报, 2018, 38(4): 373-380.
Taotao XU, Zhuqiao CHEN, Weiping TIAN, Cheng WANG, Shenglong ZHU, Fuhui WANG, Tao ZHANG, Minghui CHEN. Protective Performance of a Novel Silicone Coating ES150 Modified with Nano-particulate of Metal for AZ91D Mg-alloy. Journal of Chinese Society for Corrosion and protection, 2018, 38(4): 373-380.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.111 或 https://www.jcscp.org/CN/Y2018/V38/I4/373

图1 有机硅清漆涂层和纳米改性涂层的SEM像

图2 清漆涂层的Nyquist图及模值和相位角变化曲线

图3 纳米改性有机硅涂层的Nyquist图及模值和相位角曲线

图4 涂层等效电路

图5 Rc,Cc和Rct随浸泡时间的变化

图6 纳米改性有机硅涂层浸泡6000 h后和盐雾腐蚀5000 h后的宏观形貌

图7 涂装ES150纳米改性有机硅涂层的AZ91D镁合金经盐雾腐蚀5000 h和浸泡6000 h后以及清漆涂层浸泡5668 h后的SEM像

图8 TOPS涂层、钝化/WD40涂层、二次化学镀镍、云石(高磷)化学镀镍/WD40涂层和ES150纳米改性有机硅涂层经120 h SO2腐蚀后的宏观形貌

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