聚苯胺雙層膜防止鋼片腐蝕之研究

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Title:	聚苯胺雙層膜防止鋼片腐蝕之研究
Other Titles:	Steel corrosion protection by polyaniline bilayer film
Authors:	施政淵;Shih, Cheng-yuan
Contributors:	淡江大學化學學系碩士班高惠春;Kao, Huey-chuen I.
Keywords:	電聚合;聚苯胺;防腐蝕;溶膠-凝膠法;electropolymerization;polyaniline;anticorrosion;Sol-Gel
Date:	2009
Issue Date:	2010-01-11 02:32:36 (UTC+8)
Abstract:	本實驗分為兩部分，第一部分為有機高分子，利用直流電源供應器，電聚合聚苯胺 (PANI)單層膜及poly(2-N- phenylamino-4, 6- dimercapto-S- triazine) (PPDT)/PANI雙層膜。研究發現電聚合聚苯胺單層膜的防鏽效果不佳，鹽霧測試時間 (SST)小於1 h。由磷酸電解液所電聚合出的聚苯胺有纖維狀及晶體狀兩種結構，且有此兩種結構混合的聚苯胺，其腐蝕電位值較高。當電聚合時間為6/24 h ，PPDT/ PANI雙層膜之腐蝕電位值最大，為-0.178 V，腐蝕速率為0.405 mm/year，附著力測試為3 B等級 (<5~15％脫落)、而硬度測試則為7 H。第二部分則為有機/無機複合膜，利用電聚合法 (EP)與溶膠-凝膠法 (SG)於鋼片上形成雙層膜，應用於鋼片的防鏽。三種方法分別為SG、EP/ SG、SG/EP，其腐蝕電位、腐蝕電阻大小的順序為EP/ SG > SG > SG/EP ; 而腐蝕電流密度大小則相反，因此可得知EP/ SG防鏽效果最佳。取PMMA 3.0g 與TEOS 、aniline 混合攪拌4 day來製備Sol-gel溶液，旋轉塗佈5 s於鋼片上，接著電聚合時PANI 30 min ，所得EP/SG雙層膜之腐蝕速率為0.280 mm/year，而鹽霧測試結果可達80 h以上，附著力測試為4 B等級(< 5％脫落)、而硬度測試則為9 H 。 There were two major parts in this research. The first part uses polyaniline (PANI) and poly(2-N-phenylamino-4,6-dimercapto-S-triazine) (PPDT). They were electropolymerised on the SAE 1018 steel by a DC power supply. Single PANI layer shows poor anticorrosion effect, which sustains under the salt spray test (SST) for less than 1 h. Fibrous and crystalline materials were observed for the PANI film growing in phosphoric acid. Sample containing both structures seems have a higher corrosion potential. The best PPDT/PANI bilayer films were polymerized for 6/24 h, which has Ecorr and Rcorr of
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