Corrosion behaviour of 7075 aluminium alloy in acidic solution

被引：22
作者：
Kwolek, Przemyslaw [1 ]
机构：
[1] Rzeszow Univ Technol, Fac Mech Engn & Aeronaut, Dept Mat Sci, Rzeszow, Poland
来源：
RSC ADVANCES | 2020年 / 10卷 / 44期
关键词：
IMPEDANCE PLANE DISPLAYS; STABILITY CONDITIONS; ELECTRON-MICROSCOPY; HYDROGEN EVOLUTION; HEAT-TREATMENT; STEADY-STATE; INHIBITION; AL; DISSOLUTION; KINETICS;
D O I：
10.1039/d0ra04215c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The objective of this work was to establish the influence of sodium molybdate on the corrosion kinetics of 7075 aluminium alloy in orthophosphoric acid aqueous solution. Corrosion rate was decreased from 75.98 to 3.24 g per m(2)per day. The mechanism of corrosion inhibition was studied using scanning electron microscopy, X-ray photoelectron spectroscopy, UV-Vis spectrophotometry and electrochemical impedance spectroscopy. It was revealed that heteropolyoxomolybdate species act as the corrosion inhibitor. They adsorb onto the surface and inhibit an anodic process. Their influence on a cathodic process is much weaker. Phosphomolybdenum blue species do not inhibit corrosion process and their formation is undesirable.
引用
收藏
页码：26078 / 26089
页数：12
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