Influence of 3-aminopropyltriethoxysilane/tetraethylorthosilicate mixture pretreatment on the microstructure and corrosion resistance of zeolite coating

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Surface Engineering Pub Date : 2023-05-04 DOI:10.1080/02670844.2023.2240565

Yong Chen, Qiong Chen, Ming-an Chen

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Abstract

ABSTRACT The influence of silane pretreatment with five different volume ratios (100/0, 75/25, 50/50, 25/75, and 0/100) of 3-aminopropyltriethoxysilane (APTES)/tetraethylorthosilicate (TEOS) on microstructure and corrosion resistance of the hydrothermal synthesized zeolite coatings on the H13 steel substrates was investigated. The surface of the zeolite coatings on the 100/0, 75/25, and 50/50 mixture of the APTES/TEOS pretreated substrates was composed of intergrown rectangular particles. Additionally, pores were observed. A 25/75 mixture of APTES/TEOS pretreatment smoothed the edges and angles of zeolite particles with gel-like materials filled in the pores. In pure TEOS pretreatment, microcracks, and much gel-like materials were observed on the zeolite coating. The electrochemical test revealed that the zeolite coating on a 50/50 mixture of the APTES/TEOS pretreated substrate exhibited the highest corrosion resistance in 3.5 wt-% NaCl solution. This was because a 50/50 mixture of APTES/TEOS pretreatment advantageously promoted development of a dense and thick gel layer, which enhanced the intergrowth of zeolite particles.

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3-氨基丙基三乙氧基硅烷/原硅酸四乙酯混合物预处理对沸石涂层微观结构和耐蚀性的影响

摘要研究了3-氨基丙基三乙氧基硅烷（APTES）/正硅酸四乙酯（TEOS）五种不同体积比（100/0、75/25、50/50、25/75和0/100）的硅烷预处理对H13钢表面水热合成沸石涂层微观结构和耐蚀性的影响。APTES/TEOS预处理基底的100/0、75/25和50/50混合物上的沸石涂层表面由共生矩形颗粒组成。此外，观察到孔隙。APTES/TEOS预处理的25/75混合物使沸石颗粒的边缘和角度平滑，孔中填充凝胶状材料。在纯TEOS预处理中，在沸石涂层上观察到微裂纹和许多凝胶状材料。电化学测试表明，APTES/TEOS预处理基板50/50混合物上的沸石涂层在3.5wt-%NaCl溶液中表现出最高的耐腐蚀性。这是因为APTES/TEOS预处理的50/50混合物有利地促进了致密且厚的凝胶层的形成，这增强了沸石颗粒的共生。

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.