Corrossion Behavior of Ni-W-P Coating in Hypersaline Brine

DOI

10.2991/ap3er-15.2015.36How to use a DOI?

Keywords

Ni-W-P coating; hypersaline brine; corrosion; corrosion resistance;corrosion layer;

Abstract

To improve the corrosion resistance of N80steel, Ni-W-P coating was prepared by electroless deposition. The corrosion properties for Ni-W-P coating were investigated in hypersaline ground brine. Results of weight loss tests show that the corrosion resistance of the Ni-W-P coating is 10 times of N80steel in hypersaline brine at 90 °C. Electrochemical tests show that the current density of Ni-W-P coated sample reduce from 7.94×10-2 A/cm2 to 4.28×10-3 A/cm2, and the corrosion potential changes from –0.700 V to –0.398 V compared with N80steel. Scanning electron microscopy (SEM) micrographs and X-ray photoelectron spectroscopy (XPS) were used to evaluate the morphology and composition of the corrosion layer of Ni-W-P coating. The results show that severe intergranular corrosion appear in N80steel, whereas no intergranular corrosion occur in Ni-W-P coating. The chemical composition of the corrosion layer of Ni-W-P coating is NiO,WO3, phosphate, and hypophosphite which led to superior corrosion resistance in hypersaline brine. This study confirms that the Ni-W-P coating can be applied for corrosion protection in hypersaline environment.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qianqian Shao
AU  - Xin Zhang
AU  - Zhaojie Cui
AU  - Xianfeng Tan
PY  - 2015/06
DA  - 2015/06
TI  - Corrossion Behavior of Ni-W-P Coating in Hypersaline Brine
BT  - Proceedings of the 2015 Asia-Pacific Energy Equipment Engineering Research Conference
PB  - Atlantis Press
SP  - 147
EP  - 151
SN  - 2352-5401
UR  - https://doi.org/10.2991/ap3er-15.2015.36
DO  - 10.2991/ap3er-15.2015.36
ID  - Shao2015/06
ER  -