Anti-corrosion Self-healing Behavior of Sol-gel Coating with Nano-tube Loaded with Inhibitor
摘 要
以P25纳米颗粒为前驱体,利用水热法制备了钛酸盐纳米管,并将苯并三唑(BTA)装载于钛酸盐纳米管中,然后将含有BTA的纳米管(简称纳米管)加入到溶胶-凝胶涂层中。利用紫外分光光度计测量了BTA在不同pH酸性溶液中的释放效应。通过微区电化学、盐雾试验等研究了含纳米管涂层的缓蚀自修复行为。结果表明:随着溶液pH的降低,BTA的释放量逐渐增大;经纳米管改性涂层的防腐蚀性能明显增加,且当涂层破损后,BTA可被释放,对铝合金基体起到保护作用,阻碍基体被外界介质腐蚀,从而使涂层具有缓蚀自修复能力。
Abstract
Using P25 nanoparticles as precursor, titanate nanotubes were prepared by hydrothermal method. Benzotriazole (BTA) was loaded into the titanate nanotubes, and then the BTA-containing nanotubes (referred to as nanotubes) were added to sol-gel coating. A UV spectrophotometer was used to measure the release of BTA in acidic solutions with different pH. The corrosion-inhibiting and self-healing behavior of the coating containing nanotubes was studied through micro-area electrochemistry and salt spray tests. The results showed that as the pH of the solution decreased, the releasing amount of BTA gradually increased; the anti-corrosion performance of the nanotube-modified coating increased significantly. And when the coating was damaged, BTA could be released to protect the aluminum alloy substrate and prevent the substrate from being corroded by external media, so that the coating had a corrosion-inhibiting and self-healing ability.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202107002
所属栏目 试验研究
基金项目 国家自然科学基金(51771027);国家重点研发计划(2017YFB0702100)
收稿日期 2019/10/18
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引用该论文: WANG Zhaopeng,WANG Hongtao,XU Zhilong,YAO Qiong,ZHANG Dongjiu,XIAO Kui,WU Junsheng. Anti-corrosion Self-healing Behavior of Sol-gel Coating with Nano-tube Loaded with Inhibitor[J]. Corrosion & Protection, 2021, 42(7): 8
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【4】王娟,李晨,徐博. 溶胶-凝胶法的基本原理、发展及应用现状[J]. 化学工业与工程,2009,26(3):273-277.
【5】陈明华,王黔平. 溶胶-凝胶法制备干凝胶的干燥技术探讨[J]. 陶瓷,2008(3):31-33.
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【8】WITTMAR A,CAPARROTTI H. Simple preparation routes for corrosion protection hybrid sol-gel coatings on AA 2024[J]. Surf Interface Anal,2012,44:70-77.
【9】YASAKAU K A,ZHELUDKEVICH M L,RAPS D,et al. Preparation and corrosion protective properties of nanostructured titania-containing hybrid sol-gel coatings on AA2024[J]. Progress in Organic Coatings (an International Review Journal),2008,62(2):226-235.
【10】GONZALEZ E,PAVEZ J,AZOCAR I,et al. A silanol-based nanocomposite coating for protection of AA-2024 aluminium alloy[J]. Electrochimica Acta,2011(56):7586-7595.
【11】JOTHI K J,PALANIVELU K. Synergistic effect of silane modified nanocomposites for active corrosion protection[J]. Ceramics International,2013.
【12】ARUNCHANDRAN C,RAMYA S. Corrosion inhibitor storage and release property of TiO2 nanotube powder synthesized by rapid breakdown anodization method[J]. Materials Research Bulletin,2013(48):635-639.
【13】ARUNCHANDRAN C,RAMYA S,et al. Self-healing corrosion resistive coatings based on inhibitor loaded TiO2 nanocontainers[J]. Journal of The Electrochemical Society,2012.
【14】MAHO A,LINDEN S. Tantalum oxide/carbon nanotubes composite coatings on titanium and their functionalization with organophosphonic molecular films:a high quality scaffold for hydroxyapatite growth[J]. Journal of Colloid and Interface Science,2012,371:150-158.
【15】SCHEM M,SCHMIDT T,GERWANN J,et al. CeO2-filled sol-gel coatings for corrosion protection of AA2024-T3 aluminium alloy[J]. Corrosion Science,2009,51(10):2304-2315.
【16】SHCHUKIN D G,ZHELUDKEVICH M. Layer-by-layer assembled nanocontainers for self-healing corrosion protection[J]. Adv Mater,2006,18:1672-1678.
【17】TADEJA K,INGRID M,BORIS P. Benzotriazole as an inhibitor of brass corrosion in chloride solution[J]. Applied Surface Science,2007(253):8863-8873.
【18】柳彦梅,张存良,陈哲. 掺杂了插层2-巯基苯并咪唑Zn/Al层状双氢氧化物自修复涂层的耐蚀性[J]. 腐蚀与防护,2017,38(8):602-607.
【19】徐健,林栋. 纳米自修复涂层在GH907材料腐蚀防护上的应用[J]. 腐蚀与防护,2014,35(11):1144-1147,1151.
【20】ZOLTÁN A,KÁROLY M,ÁGNES S,et al. Low temperature synthesis,characterization and substrate-dependent photocatalytic activity of nanocrystalline TiO2 with tailor-made rutile to anatase ratio[J]. Applied Catalysis A,General,2008,340(2).
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