Next Article in Journal
Study on the Preparation of a High-Efficiency Carbon Fiber Dissipating Coating
Next Article in Special Issue
Nanoscale Characterization of Glass Flake Filled Vinyl Ester Anti-Corrosion Coatings
Previous Article in Journal
Effect of Si3N4 Addition on Oxidation Resistance of ZrB2-SiC Composites
Previous Article in Special Issue
Silica-Based Sol-Gel Coating on Magnesium Alloy with Green Inhibitors
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Coatings 2017, 7(7), 93; https://doi.org/10.3390/coatings7070093

Investigation on the Cathodic Protection Effect of Low Pressure Cold Sprayed AlZn Coating in Seawater via Numerical Simulation

1
Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Material Research Institute, Qingdao 266101, China
2
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
3
Sunrui Marine Environment Engineering Co., Ltd., Qingdao 266101, China
*
Author to whom correspondence should be addressed.
Received: 8 May 2017 / Revised: 18 June 2017 / Accepted: 28 June 2017 / Published: 4 July 2017
(This article belongs to the Special Issue Coatings for Corrosion Mitigation)
Full-Text   |   PDF [4585 KB, uploaded 4 July 2017]   |  

Abstract

Cold spray can deposit a composite coating simply by spraying mechanically-mixed Al and Zn powders, while no quantitative data has been reported on the anti-corrosion performance of different composite cold-sprayed coatings. In the present work, the finite element method was used to estimate the cathodic protection effect by simulating the potential distribution on a damaged cold-sprayed AlZn coating on Q235 steel. The results indicate that AlZn coating can only provide a limiting cathodic protection for substrate, because it can only polarize a very narrow zone negative to −0.78 V (vs. SCE, saturated calomel electrode). The remaining area of the steel substrate still has a very high residual corrosion rate. Computational methods can be used to predict the corrosion rate of AlZn coating, and the simulation results were validated by the results of a weight loss experiment. View Full-Text
Keywords: cathodic protection; corrosion; galvanic corrosion; cold spray; sacrificial metallic layer cathodic protection; corrosion; galvanic corrosion; cold spray; sacrificial metallic layer
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Huang, G.; Lou, X.; Wang, H.; Li, X.; Xing, L. Investigation on the Cathodic Protection Effect of Low Pressure Cold Sprayed AlZn Coating in Seawater via Numerical Simulation. Coatings 2017, 7, 93.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top