Influence of sealing treatment on the corrosion behavior of HVAF sprayed Al-based amorphous/nanocrystalline coating
Influence of sealing treatment on the corrosion behavior of HVAF sprayed Al-based amorphous/nanocrystalline coating
复制标题
封孔处理对HVAF喷涂铝基非晶/纳米晶涂层腐蚀行为的影响
DOI：
10.1016/j.surfcoat.2018.08.086
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发表时间：
2018-11
影响因子：
5.4
通讯作者：
Wang J.Q.
中科院分区：
文献类型：
--
作者：
Zhang L.M.;Zhang S.D.;Ma A.L.;Hu H.X.;Zheng Y.G.;Yang B.J.;Wang J.Q.
采用高速空气燃料喷涂技术在2024铝合金表面制备了低孔隙率（0.42%）、高非晶含量（80.3%）的al基非晶/纳米晶涂层。这种由α-Al纳米晶在非晶基体中析出的薄非晶/纳米晶涂层具有良好的短期耐蚀性，但随着浸泡时间的增加，其耐蚀性迅速下降。密封处理可以有效地封闭连接气孔，减少涂层的气孔缺陷，从而提高耐腐蚀性。在三种密封剂中，硬脂酸对al基非晶/纳米晶涂层的密封效果最好，具有良好的抗渗疏水性，其次是重铬酸钾和醋酸镍。从涂层与密封胶界面的反应和硬脂酸的疏水性等方面讨论了三种密封胶的密封机理。
Al-based amorphous/nanocrystalline coating with a low porosity (0.42%) and a high amorphous content (80.3%) was fabricated by high velocity air-fuel spraying on aluminum alloy 2024. This thin amorphous/nanocrystalline coating with α-Al nanocrystals precipitated in amorphous matrix displays good short-term corrosion resistance, while the corrosion resistance decreases rapidly with increased immersion time. Sealing treatment can effectively close the connecting pores and reduce the porosity defects of coating, thereby improving the corrosion resistance. Among the three selected sealants, stearic acid exhibits the best sealing effect on Al-based amorphous/nanocrystalline coating due to its good impermeability and hydrophobicity, followed by potassium dichromate and nickel acetate. The sealing mechanisms of the three sealants are discussed in terms of reactions at the coating/sealant interface and hydrophobicity of stearic acid.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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