N，N-二甲基-(4-歧化松香胺甲基)苯胺对碳钢在盐酸溶液中缓蚀性能  

Corrosion Inhibition of N,N-Dimethyl-(4-Disproportionated Rosin Aminomethyl)-Phenylamine on Carbon Steel in HCl Solution

作　　者：黄道战[1] 曹俊耀[1] 王小淑[1] 颜芳[1] 

机构地区：[1]广西民族大学化学化工学院,广西林产化学与工程重点实验室,南宁530006

出　　处：《腐蚀与防护》2012年第11期968-971,975,共5页Corrosion & Protection

基　　金：广西自然科学基金(2011GXNSFA018057);广西教育厅科研项目(201010LX083);广西民族大学引进人才科研启动项目(2010QD020)

摘　　要：采用静态失重法和电化学方法研究歧化松香胺还原席夫碱N,N-二甲基-(4-歧化松香胺甲基)苯胺(DD-RAP)在盐酸溶液中对A3钢的缓蚀性能。静态失重法试验表明,DDRAP能有效抑制盐酸溶液中A3钢的腐蚀;在60℃的6.0%的盐酸溶液中,DDRAP加量为100mg·L-1时,A3钢的腐蚀速度为0.2806mg·cm-2·h-1,缓蚀率达到97.74%。吸附规律研究结果表明,DDRAP在A3钢表面的吸附符合Langmuir吸附等温式,其吸附自由能为-29.94kJ·mol-1,吸附为自发进行的物理和化学吸附。电化学试验表明DDRAP属阴极型缓蚀剂。A reduced Schiff base corrosion inhibitor of N, N-dimethyl-（4-disproportionated rosin aminomethyl）- phenylamine （DDRAP） was synthesized from disproportionated rosin amine, and its inhibition efficiency for the corrosion of A3 steel in HC1 solution was investigated by weight-loss measurement and polarization curves. The results of weight loss showed that the corrosion rate and inhibition efficiency for carbon steel were 0. 2806 mg·cm-2·h-1 and 97. 74 % respectively when the DDRAP concentration was 100 mg·L-1 in HC1 solution at 60 ~C. The adsorption of DDRAP on A3 steel in HC1 solution obeyed Langmuir isotherm and the obtained standard free energy depended on both physicosorption and chemisorption The influences of temperature and HC1 concentration were also studied. Polarization curves reveal that DDRAP is a cathodic corrosion inhibitor.

关 键 词：歧化松香胺 二甲胺基苯甲醛 还原席夫碱 缓蚀剂 碳钢 盐酸 

分 类 号：TG174.42[金属学及工艺—金属表面处理]