BTA酰基衍生物的合成及对Cu在3%NaCl水溶液中缓蚀性能的研究

SYNTHESIS OF SOME CARBONYL DERIVATIVES OF BTA AND DETERMINATION OF THEIR INHIBITIVE PROPERTIES FOR COPPER IN 3%NaCl SOLUTION

用苯并三氮唑（ＢＴＡ）和酸性氯化物（酰氯类）合成７种ＢＴＡ酰基衍生物．采用间接失重方法比较ＢＴＡ及其衍生物对Ｃｕ在３％ＮａＣｌ水溶液中的缓蚀性能．结果表明：７种ＢＴＡ衍生物中，Ｇｌｕｔａｒｙｌ／ＢＴＡ的缓蚀性能远优于ＢＴＡ；Ｃ５／ＢＴＡ的缓蚀性不及ＢＴＡ；其余５种的缓蚀性能均略优于ＢＴＡ．用传统的失重方法测试金属缓蚀性能需要最少几十天才能完成．用阳极微分脉冲溶出伏安法（ＤＰＡＳ），可以灵敏地测出Ｃｕ泡在３％ＮａＣｌ里一天溶出痕量的铜离子浓度．

types of carbonyl derivatives of benzotriazole (BTA) were synthesised by direct reacting BTA with their respective acid chlorides. Their inhibitive properties for copper in 3% NaCl solution were determined using the Differential Pulse Anodic Stripping Voltammetric Method (DPAS). Results showed that among the 7 types of BTA derivatives synthesised, the inhibitive property of glutaryl/BTA for copper was superior to BTA; while C5/BTA was inferior to BTA; the remaining 5 types were slightly superior to BTA. The conventional weight loss method requires over 6 months to complete. The DPAS method developed can be used to monitor the trace amount of copper during a day and can provide a convenient, rapid and reliable method to measure the corrosion rate of metals.