表面技术2017，Vol.46Issue(6)：202-206,5.DOI:10.16490/j.cnki.issn.1001-3660.2017.06.032
热镀锌板双硅烷无铬钝化膜性能的研究
Properties of Bis-silane Chromium-free Passive Film on Hot-dip Galvanized Steel
摘要
Abstract
The work aims to further improve corrosion resistance of chromium-free passive film on hot-dip galvanized steel. With H2TiF6 and NH4VO3 as proper inorganic constituents and styrene-acrylic emulsion as major film-forming material, a layer of corrosive bis-silane chromium-free passive film was obtained on hot-dip galvanized steel by binding the constituents tightly using silicon coupling agent (KH-560, KH-570). Corrosion resistance of the bis-silane chromium-free passive film was charac-terized by neutral salt spray test, electrochemical test, scanning electron microscopy and Fourier infrared spectroscopy. Corro-sion area of the film accounted for approximately 2%~4% after 96 h neutral salt spray test, and corrosion current density was one order of magnitude lower than that of untreated hot-dip galvanized steel, indicating that the bis-silane chromium-free pas-sive film could exhibit excellent corrosion resistance. SEM analysis showed that a nearly 3μm thick uniform, continuous and compact passive film took shape on the surface of hot-dip galvanized steel. FTIR analysis indicated that—(CH2) n—, C=O, Si—O, Si—O—Si and Si—O—Zn bonds were present in the passive film. The hot-dip galvanized steel exhibits excellent cor- rosion resistance and meets requirements of industrial application since a layer of uniform and compact passive film takes shape on the surface of hot-dip galvanized steel.关键词
热镀锌板/耐腐蚀性能/硅烷/无铬/钝化膜Key words
hot-dip galvanized steel/corrosion resistance/silane/chromium-free/passive film分类
矿业与冶金引用本文复制引用
高波,董立洋,朱广林,高超,周英伟..热镀锌板双硅烷无铬钝化膜性能的研究[J].表面技术,2017,46(6):202-206,5.基金项目
国家自然科学基金(51671052) Supported by the National Natural Science Foundation of China (51671052) （51671052）
