电化学2017，Vol.23Issue(4)：441-455,15.DOI:10.13208/j.electrochem.151222
柠檬酸中锌防蚀剂(1,3-Dioxolan-2-ylmethyl)三苯基溴化磷和碘离子的协同效应研究
An Investigation of the Synergistic Effect between (1,3-Dioxolan-2-ylmethyl)-Triphenylphosphonium Bromide and Iodide Ion for the Corrosion Inhibition of Zinc in Citric Acid
M.Saadawy1
作者信息
- 1. 埃及亚历山大大学理学院化学系,亚历山大21321
- 折叠
摘要
Abstract
The effect of (1,3-Dioxolan-2-ylmethyl)-triphenylphosphonium bromide (DTPB) on the zinc corrosion in 0.5 mol· L-1 citric acid solution was investigated at 30 ℃ using weight loss,potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques.An ecofriendly bath was used for acid cleaning of zinc,which has not been widely used in literatures.The results showed that DTPB could serve as an effective inhibitor for the zinc corrosion in a citric acid solution with the inhibition efficiency of 98.9％ at the DTPB concentration of 3 × 10-3 mol·L-1.A synergistic effect between DTPB and potassium iodide (KI) enhanced the inhibition capability of DTPB,and better inhibition efficiency was achieved as compared with that by using DTPB alone.The synergism parameter had a value of 1.2 and was found to decrease with temperature.An inhibition mechanism is proposed by which KI acts as an adsorption mediator for bonding metal surface and DTPB.关键词
锌/极化/电化学交流阻抗/酸蚀/协同Key words
zinc/polarization/electrochemical impedance spectroscopy/acid corrosion/synergism分类
化学化工引用本文复制引用
M.Saadawy..柠檬酸中锌防蚀剂(1,3-Dioxolan-2-ylmethyl)三苯基溴化磷和碘离子的协同效应研究[J].电化学,2017,23(4):441-455,15.
