Corrosion resistance of Ni/Cu/Ni-P triple-layered coating on Mg-Li alloy

Dehua Chen; Nan Jin; Weiwei Chen; Lu Wang; Shenqiang Zhao; Dawei Luo

doi:10.1016/j.surfcoat.2014.06.060

Corrosion resistance of Ni/Cu/Ni-P triple-layered coating on Mg-Li alloy

Dehua Chen, Nan Jin, Weiwei Chen^*, Lu Wang, Shenqiang Zhao, Dawei Luo

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

In the present paper, a protective Ni/Cu/Ni-P triple-layered coating was successfully prepared on Mg-Li alloy. The Ni, Cu and Ni-P layers served as the outmost, middle and transition layers with the thickness of ~0μm, ~20μm and ~5μm, respectively. The Ni/Cu/Ni-P coating showed superior corrosion resistance in 3.5wt.% NaCl solution with the corrosion current density of 4.04μAcm^-2 compared to 12,878.2μAcm^-2 of the Mg-Li substrate. No corrosion was macroscopically observed after the coating was immersed in 3.5wt.% NaCl solution for 360h. The corrosion mechanism was systematically discussed based on cyclic voltammetry. It was revealed that the outmost Ni layer significantly improved the pitting potential. The Cu middle layer was galvanically protected. We believe that the coated Mg-Li alloy exhibiting superior corrosion resistance will find a wide range of applications in aeronautic, astronautic, electronic and automotive industries.

Original language	English
Pages (from-to)	440-446
Number of pages	7
Journal	Surface and Coatings Technology
Volume	254
DOIs	https://doi.org/10.1016/j.surfcoat.2014.06.060
Publication status	Published - 15 Sept 2014

Keywords

Corrosion resistance
Cyclic voltammetry
Layered coating
Mg-Li alloy
Polarization

Access to Document

10.1016/j.surfcoat.2014.06.060

Cite this

@article{8375874b80f34a1691e64448db3c4e2c,

title = "Corrosion resistance of Ni/Cu/Ni-P triple-layered coating on Mg-Li alloy",

abstract = "In the present paper, a protective Ni/Cu/Ni-P triple-layered coating was successfully prepared on Mg-Li alloy. The Ni, Cu and Ni-P layers served as the outmost, middle and transition layers with the thickness of ~0μm, ~20μm and ~5μm, respectively. The Ni/Cu/Ni-P coating showed superior corrosion resistance in 3.5wt.% NaCl solution with the corrosion current density of 4.04μAcm-2 compared to 12,878.2μAcm-2 of the Mg-Li substrate. No corrosion was macroscopically observed after the coating was immersed in 3.5wt.% NaCl solution for 360h. The corrosion mechanism was systematically discussed based on cyclic voltammetry. It was revealed that the outmost Ni layer significantly improved the pitting potential. The Cu middle layer was galvanically protected. We believe that the coated Mg-Li alloy exhibiting superior corrosion resistance will find a wide range of applications in aeronautic, astronautic, electronic and automotive industries.",

keywords = "Corrosion resistance, Cyclic voltammetry, Layered coating, Mg-Li alloy, Polarization",

author = "Dehua Chen and Nan Jin and Weiwei Chen and Lu Wang and Shenqiang Zhao and Dawei Luo",

year = "2014",

month = sep,

day = "15",

doi = "10.1016/j.surfcoat.2014.06.060",

language = "English",

volume = "254",

pages = "440--446",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Corrosion resistance of Ni/Cu/Ni-P triple-layered coating on Mg-Li alloy

AU - Chen, Dehua

AU - Jin, Nan

AU - Chen, Weiwei

AU - Wang, Lu

AU - Zhao, Shenqiang

AU - Luo, Dawei

PY - 2014/9/15

Y1 - 2014/9/15

N2 - In the present paper, a protective Ni/Cu/Ni-P triple-layered coating was successfully prepared on Mg-Li alloy. The Ni, Cu and Ni-P layers served as the outmost, middle and transition layers with the thickness of ~0μm, ~20μm and ~5μm, respectively. The Ni/Cu/Ni-P coating showed superior corrosion resistance in 3.5wt.% NaCl solution with the corrosion current density of 4.04μAcm-2 compared to 12,878.2μAcm-2 of the Mg-Li substrate. No corrosion was macroscopically observed after the coating was immersed in 3.5wt.% NaCl solution for 360h. The corrosion mechanism was systematically discussed based on cyclic voltammetry. It was revealed that the outmost Ni layer significantly improved the pitting potential. The Cu middle layer was galvanically protected. We believe that the coated Mg-Li alloy exhibiting superior corrosion resistance will find a wide range of applications in aeronautic, astronautic, electronic and automotive industries.

AB - In the present paper, a protective Ni/Cu/Ni-P triple-layered coating was successfully prepared on Mg-Li alloy. The Ni, Cu and Ni-P layers served as the outmost, middle and transition layers with the thickness of ~0μm, ~20μm and ~5μm, respectively. The Ni/Cu/Ni-P coating showed superior corrosion resistance in 3.5wt.% NaCl solution with the corrosion current density of 4.04μAcm-2 compared to 12,878.2μAcm-2 of the Mg-Li substrate. No corrosion was macroscopically observed after the coating was immersed in 3.5wt.% NaCl solution for 360h. The corrosion mechanism was systematically discussed based on cyclic voltammetry. It was revealed that the outmost Ni layer significantly improved the pitting potential. The Cu middle layer was galvanically protected. We believe that the coated Mg-Li alloy exhibiting superior corrosion resistance will find a wide range of applications in aeronautic, astronautic, electronic and automotive industries.

KW - Corrosion resistance

KW - Cyclic voltammetry

KW - Layered coating

KW - Mg-Li alloy

KW - Polarization

UR - http://www.scopus.com/inward/record.url?scp=84905010487&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2014.06.060

DO - 10.1016/j.surfcoat.2014.06.060

M3 - Article

AN - SCOPUS:84905010487

SN - 0257-8972

VL - 254

SP - 440

EP - 446

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Corrosion resistance of Ni/Cu/Ni-P triple-layered coating on Mg-Li alloy

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this