The Synergetic Effect of Flow Velocity and Exposing Time on the Electrochemical Behavior of Cu-Ni 90/10 Alloy in Simulating Conditions of Desalination Plant

被引：7

作者：

Besghaier, Rabia ^{[1
,2
,3
]}

Dhouibi, Leila ^{[1
,4
]}

Jeannin, Marc ^{[2
]}

Safi, Mohamed Jomaa ^{[1
]}

机构：

[1] Univ Tunis El Manar, Equipe Rech Corros & Protect Metall, ENIT, Unite Rech Energet Mecan, Rue Bechir Salem Belkhiria,Campus Univ,BP 37, Belvedere 1002, Tunisia

[2] Univ La Rochelle, CNRS, UMR 7356, Lab Sci Ingenieur Environm, Batiment Marie Curie, F-17042 La Rochelle 01, France

[3] Ecole Natl Ingenieurs Gabes, Ave Omar Ibn El Khattab, Zrigeddakhlania 6072, Gabes, Tunisia

[4] Univ Tunis, IPEIT, Rue Jawaharlal Nehru, Tunis 1089, Tunisia

来源：

CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY | 2019年 / 2卷 / 03期

关键词：

Copper-Nickel; Desalination conditions; Corrosion; Electrochemical tests; SODIUM-CHLORIDE SOLUTIONS; COPPER CORROSION; ANODIC-DISSOLUTION; INHIBITION; FILM; TUBE; POLARIZATION; SPECTROSCOPY; NICKEL; MEDIA;

D O I：

10.1007/s42250-019-00064-z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A laboratory investigation has been achieved to study the effect of flow velocity on the corrosion behaviour of Cu-Ni 90/10 alloy immersed in synthetic seawater, at 60 degrees C which simulates the real condition of desalination industry in the south of Tunisia. Flow velocity was one of major parameters influencing the oxidation process of cupronickel pipe, through its effect on mass transport and corrosion rate. This influence has been examined on a laboratory scale by means of electrochemical techniques like: Potentio-dynamic polarization, electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR). Results show that the flow velocity has a significant influence on corrosion rate, compared to static immersion. This effect was confirmed by means of corrosion current density (icorr) increase and polarization resistance Rp decrease with exposure time, as indicated by LPR and EIS measurements. Corrosion was attributed to the film deterioration by the erosion corrosion phenomena, caused essentially by hydrodynamic conditions. Indeed, at stagnant condition, the substrate proves a higher corrosion resistance due to the stability of the protective layer.

引用

页码：483 / 495

页数：13