全面腐蚀控制
全麵腐蝕控製
전면부식공제
TOTAL CORROSION CONTROL
2014年
5期
36-40
,共5页
张亚博%赵芯%苏正良%夏祖西
張亞博%趙芯%囌正良%夏祖西
장아박%조심%소정량%하조서
镁合金%航空化学品%腐蚀%重铬酸盐转化膜
鎂閤金%航空化學品%腐蝕%重鉻痠鹽轉化膜
미합금%항공화학품%부식%중락산염전화막
magnesium alloy%airplane maintenance materials%corrosion%dichromate conversion coating
本文介绍了重铬酸盐处理后的镁合金在航空化学品中的主要腐蚀形式，使用扫描电镜和XRD表征了铬酸盐转化膜的微观结构和组成，并通过EG&G M273恒电位仪测量在航空化学品种的极化曲线和电化学阻抗谱，试验结果表明处理后的镁合金在符合AMS 1435标准的机场道面除冰防冰液、符合标准AMS1526飞机清洗剂、符合AMS 1425标准的飞机消毒液、符合AMS 1424标准的I型飞机除冰防冰液中的腐蚀电位均在-1.5~-1.6V之间，明显比裸镁合金(-2.36V)的腐蚀电位高。从电化学阻抗谱上可以看出经重铬酸盐处理后的镁合金在符合AMS 1424 I型除冰液中的腐蚀体系属于吸附型缓蚀剂体系；在符合AMS1435标准的机场道面除冰液中的腐蚀通常会产生中间产物，符合AMS 1526标准的飞机清洗剂和符合AMS 1425标准的飞机消毒液的电极反应通常受电化学极化控制。
本文介紹瞭重鉻痠鹽處理後的鎂閤金在航空化學品中的主要腐蝕形式，使用掃描電鏡和XRD錶徵瞭鉻痠鹽轉化膜的微觀結構和組成，併通過EG&G M273恆電位儀測量在航空化學品種的極化麯線和電化學阻抗譜，試驗結果錶明處理後的鎂閤金在符閤AMS 1435標準的機場道麵除冰防冰液、符閤標準AMS1526飛機清洗劑、符閤AMS 1425標準的飛機消毒液、符閤AMS 1424標準的I型飛機除冰防冰液中的腐蝕電位均在-1.5~-1.6V之間，明顯比裸鎂閤金(-2.36V)的腐蝕電位高。從電化學阻抗譜上可以看齣經重鉻痠鹽處理後的鎂閤金在符閤AMS 1424 I型除冰液中的腐蝕體繫屬于吸附型緩蝕劑體繫；在符閤AMS1435標準的機場道麵除冰液中的腐蝕通常會產生中間產物，符閤AMS 1526標準的飛機清洗劑和符閤AMS 1425標準的飛機消毒液的電極反應通常受電化學極化控製。
본문개소료중락산염처리후적미합금재항공화학품중적주요부식형식，사용소묘전경화XRD표정료락산염전화막적미관결구화조성，병통과EG&G M273항전위의측량재항공화학품충적겁화곡선화전화학조항보，시험결과표명처리후적미합금재부합AMS 1435표준적궤장도면제빙방빙액、부합표준AMS1526비궤청세제、부합AMS 1425표준적비궤소독액、부합AMS 1424표준적I형비궤제빙방빙액중적부식전위균재-1.5~-1.6V지간，명현비라미합금(-2.36V)적부식전위고。종전화학조항보상가이간출경중락산염처리후적미합금재부합AMS 1424 I형제빙액중적부식체계속우흡부형완식제체계；재부합AMS1435표준적궤장도면제빙액중적부식통상회산생중간산물，부합AMS 1526표준적비궤청세제화부합AMS 1425표준적비궤소독액적전겁반응통상수전화학겁화공제。
The article describes main forms of corrosion of dichromate conversion coating on magnesium alloy in airplane maintenance materials. The composition and structure of dichromate conversion coating on magnesium alloy were investigated by means of SEM and XRD. The polarization curve and electrochemical impedance spectra of dichromate conversion coating on magnesium alloy were investigated by EG&G M273potentiostat. The results indicate that corrosion potential of dichromate conversion coating on magnesium alloy in Deicing/Anti-Icing Fluids of Runways and Taxiways according with AMS 1435, Cleaner according with AMS 1526, disinfectant according with AMS 1425 , Type I Deicing/Anti-Icing Fluids according with AMS 1424 between-1.5V and-1.6V. The corrosion potential of dichromate conversion coating on magnesium alloy is higher than magnesium alloy. The electrochemical impedance spectroscopy indicate that dichromate conversion coating on magnesium alloy in Type I Deicing/Anti-Icing Fluids according with AMS 1424 is adsorption-type inhibitor system;the electrode reactions in Deicing/Anti-Icing Fluids of Runways and Taxiways according with AMS 1435 is generate intermediate products. The electrode reactions in Cleaner according with AMS 1526 and disinfectant according with AMS 1425 were controlled by electro-chemical polarization.
