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首页> 外文期刊>RSC Advances >Effect of graphene oxide on anticorrosion performance of polyelectrolyte multilayer for 2A12 aluminum alloy substrates
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Effect of graphene oxide on anticorrosion performance of polyelectrolyte multilayer for 2A12 aluminum alloy substrates

机译：氧化石墨烯对2A12铝合金基材聚电解质多层膜耐腐蚀性能的影响

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摘要

Corrosion of aluminum alloys (Al alloys) has been a ubiquitous problem, and this seriously restricts its range of applications. Herein, a layer-by-layer (LBL) self-assembly method based on the formation and deposition of polyelectrolyte multilayers was employed to fabricate anticorrosion layers on 2A12 Al alloys for corrosion protection. LBL self-assembled films, with and without graphene oxide, were formed on Al alloy surface. The surface morphologies, roughness and chemical compositions of the as-fabricated LBL self-assembled films were characterized by several methods, such as, SEM, AFM, and XPS techniques. The electrochemical properties of the specimens were determined by EIS measurements. The comprehensive equivalent circuits were established to analyze the anticorrosion performance and inhibition efficiency of the resultant LBL self-assembled surfaces. The results indicate that the LBL self-assembled film exhibits inhibition efficiency over 99% in a 3.5% NaCl solution. After dragging to a distance of 200 mm or 400 mm, the inhibition efficiency of the LBL self-assembled film containing graphene oxide can still exceed 96%. LBL self-assembled films are considered to provide a new strategy for marine corrosion protection.
机译：铝合金（Al铝合金）的腐蚀一直是普遍存在的问题，这严重限制了其应用范围。在此，基于聚电解质多层的形成和沉积的逐层（LBL）自组装方法被用于在2A12铝合金上制造防腐蚀层以进行腐蚀保护。在铝合金表面上形成有或没有氧化石墨烯的LBL自组装膜。通过几种方法，如SEM，AFM和XPS技术，对制成的LBL自组装膜的表面形貌，粗糙度和化学成分进行了表征。通过EIS测量确定样品的电化学性质。建立了全面的等效电路以分析所得LBL自组装表面的防腐性能和抑制效率。结果表明，LBL自组装膜在3.5％NaCl溶液中的抑制效率超过99％。拖动到200毫米或400毫米的距离后，含氧化石墨烯的LBL自组装膜的抑制效率仍可超过96％。 LBL自组装膜被认为为海洋腐蚀防护提供了新的策略。

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