二氧化硅基有机-无机防腐蚀杂化膜的制备及性能  

Preparation and Properties of Silica-Based Organic-Inorganic Hybrid Anticorrosion Coatings

作　　者：贾文杰[1] 朱建龙[2] 李澄[1] 王加余[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院应用化学系,江苏南京210016 [2]江苏法尔胜新日制铁缆索有限公司,江苏江阴214445

出　　处：《材料保护》2009年第7期39-41,65,共4页Materials Protection

摘　　要：传统的钢铁表面覆膜技术如磷化、铬酸盐钝化等污染严重,硅烷化和有机-无机杂化涂层用于金属预处理则具有耐温、耐腐蚀等优点,又利于环保。以正硅酸乙酯、γ-氨丙基三乙氧基硅烷为原料,采用溶胶-凝胶法制备了SiO2基有机-无机杂化材料。通过红外光谱对不同温度处理的杂化材料进行了分析,以差示扫描量热法研究了杂化材料在不同温度下的吸放热反应,结合对杂化溶胶涂覆于钢铁基体表面形成涂层的塔菲尔曲线分析,对杂化膜的保护性能进行了研究。结果表明:涂层试样在N2气氛下300℃热处理,可以保证涂层中Si-O-Si键等最大程度地键合,并有效保留了有机组分,从而有利于保证杂化材料涂层的完整性,较大地提高了基体钢铁的耐腐蚀性能,可作为金属表面涂装处理工序中良好的中间过渡层。Silica-based organic-inorganic hybrid material was prepared from tetraethoxysilane (TEOS) and γ-aminopropyltriethoxy silane by sol-gel method. The chemical bonding feature and endothermic-exothermic reaction of the hybrid materials heat-treated at different temperatures were investigated by means of infrared spectrometry and differential scanning calorimetry ( DSC). Electrochemical analysis (Tafel curve) was carried out to evaluate the corrosion protection action of the sprayed hybrid coating for the steel substrate. Results indicate that after being heated at 300 ℃ in nitrogen, optimized Si-O-Si bonding was realized in the hybrid coating, and the organic ingredients were effectively retained in the coating. Subsequently, the hybrid coating had good integrality and was able to effectively increase the corrosion resistance of the steel sub- strate. In one word, the hybrid coating might be used as an intermediate coating for surface finishing of metals.

关 键 词：防腐蚀膜 溶胶-凝胶 有机.无机杂化 性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]