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7075铝合金在酸性溶液中的腐蚀行为。

Corrosion behaviour of 7075 aluminium alloy in acidic solution.

作者信息

Kwolek Przemysław

机构信息

Rzeszow University of Technology, Faculty of Mechanical Engineering and Aeronautics, Department of Materials Science Poland

出版信息

RSC Adv. 2020 Jul 10;10(44):26078-26089. doi: 10.1039/d0ra04215c. eCollection 2020 Jul 9.

DOI:10.1039/d0ra04215c
PMID:35519786
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055331/
Abstract

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 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.

摘要

这项工作的目的是确定钼酸钠对7075铝合金在正磷酸水溶液中的腐蚀动力学的影响。腐蚀速率从每天每平方米75.98克降至3.24克。使用扫描电子显微镜、X射线光电子能谱、紫外可见分光光度法和电化学阻抗谱研究了缓蚀机理。结果表明，杂多钼酸盐类物质作为缓蚀剂。它们吸附在表面并抑制阳极过程。它们对阴极过程的影响要弱得多。磷钼蓝类物质不抑制腐蚀过程，其形成是不可取的。

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The molybdenum blue reaction for the determination of orthophosphate revisited: Opening the black box.用于测定正磷酸盐的钼蓝反应再探讨：打开黑匣子。
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