Effect of additives on the corrosion mechanism of nanocrystalline zinc–nickel alloys in an alkaline bath

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 88469-88485 ◽  
Author(s):  
Zhongbao Feng ◽  
Lili Ren ◽  
Jinqiu Zhang ◽  
Peixia Yang ◽  
Maozhong An
Keyword(s):  
Corrosion Resistance ◽  
Nickel Alloys ◽  
Corrosion Mechanism ◽  
Ni Alloys ◽  
Effect Of Additives ◽  
Alkaline Bath ◽  
Zinc Nickel

Bright Zn–Ni alloys can be obtained from the bath with additives. The mechanism of better corrosion resistance of bright Zn–Ni alloys compared to dull Zn–Ni alloys was analyzed by XPS and EIS.

scholarly journals Zinc-nickel alloy coatings: electrodeposition kinetics, corrosion, and selective dissolution. A review

2021 ◽  
Vol 23 (1) ◽  
pp. 3-15
Author(s):  
Dmitrii V. Burliaev ◽  
Oleg A. Kozaderov ◽  
Polina Volovitch
Keyword(s):  
Ammonium Chloride ◽  
Nickel Alloys ◽  
Selective Dissolution ◽  
Ni Alloys ◽  
Nickel Coatings ◽  
Chloride Deposition ◽  
Kinetics Of ◽  
Deposition Electrolyte ◽  
Zinc Nickel

A review of the literature is devoted to the patterns of the electrodeposition of zinc-nickel alloys including the kinetics of cathodic reduction of zinc, nickel, and zinc-nickel alloys in ammonium chloride, sulphate, and glycinate deposition electrolytes. We studied the data on the effectiveness of the corrosion resistance of zinc-nickel coatings and summarised the principal patterns of selective dissolution of the Zn-Ni alloys. The role of the addition of glycine to an ammonium chloride deposition electrolyte was determined in the modification of the morphological and anticorrosive properties of the coatings.

INVESTIGATION OF SOME PROPERTIES OF ZINC-NICKEL ALLOY PLATING WITH TRIETHANOLAMINE, p-AMINOBENZENESULFONIC ACID, AND GELATINE

2020 ◽  
Vol 27 (12) ◽  
pp. 2050018
Author(s):  
AHMET OZAN GEZERMAN
Keyword(s):  
Corrosion Resistance ◽  
Nickel Alloy ◽  
Complexing Agent ◽  
X Ray ◽  
Ni Alloys ◽  
Ni Alloy ◽  
Alloy Plating ◽  
Zinc Nickel

Anticorrosion requirements for the metallurgy, automotive, and aeronautical industries have increased in recent years, for which alternative plating chemicals must be developed. This study focuses on obtaining a Zn-Ni alloy plating with higher corrosion resistance and brightness. For this purpose, tetraethylenepentaamine as complexing agent, triethanolamine as the surfactant, and gelatin and [Formula: see text]-aminobenzenesulfonic acid as brightening agents for the plating were selected and their optimal concentrations were determined for applications. The optimal Zn-Ni ratio and plating thickness were analyzed using an X-ray Dal device. Improved plating performance of the Zn-Ni alloys was achieved with a Zn-Ni alloy containing 12–14% Ni.

scholarly journals Progress in Electrodeposition of Zinc and Zinc Nickel Alloys Using Ionic Liquids

2020 ◽  
Vol 10 (15) ◽  
pp. 5321
Author(s):  
Kranthi Kumar Maniam ◽  
Shiladitya Paul
Keyword(s):  
Ionic Liquids ◽  
Nickel Alloys ◽  
Hydrogen Gas ◽  
Environmental Toxicity ◽  
Nickel Electrodeposition ◽  
Ni Alloys ◽  
Different Types ◽  
Technological Developments ◽  
Significant Attention ◽  
Zinc Nickel

Zinc (Zn) and zinc–nickel (Zn–Ni) electrodeposition has been widely used in many industries, such as automotive and aerospace, for corrosion protection of steel components owing to their excellent corrosion resistance. Conventional zinc and zinc–nickel electrodeposition is performed in different types of aqueous baths (acid and alkaline). Such electrolytes suffer from certain drawbacks such as hydrogen gas evolution, low coulombic efficiencies, and environmental toxicity. Electrodeposition of Zn and Zn–Ni alloys from ionic liquids has gained significant attention in aerospace and automotive sectors owing to the different environments they provide for electrodeposition. This paper reviews the progress in deposition of zinc and zinc-nickel alloys in non-aqueous systems, especially ionic liquids. In addition, the challenges and technological developments associated with the Zn and Zn–Ni deposition on different substrates and the factors that need to be considered while electroplating at an industrial scale are discussed.

Studies on the enhanced properties of nanocrystalline Zn–Ni coatings from a new alkaline bath due to electrolyte additives

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58199-58210 ◽  
Author(s):  
Zhongbao Feng ◽  
Qingyang Li ◽  
Jinqiu Zhang ◽  
Peixia Yang ◽  
Maozhong An
Keyword(s):  
Corrosion Resistance ◽  
Electrolyte Additives ◽  
Ni Alloys ◽  
Wear And Corrosion ◽  
Alkaline Bath ◽  
Enhanced Properties ◽  
Wear And Corrosion Resistance

Mirror-bright nanocrystalline Zn–Ni alloys with excellent wear and corrosion resistance are obtained from a novel bath with composite additives.

Corrosion mechanism of nanocrystalline Zn–Ni alloys obtained from a new DMH-based bath as a replacement for Zn and Cd coatings

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64726-64740 ◽  
Author(s):  
Zhongbao Feng ◽  
Maozhong An ◽  
Lili Ren ◽  
Jinqiu Zhang ◽  
Peixia Yang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Mechanism ◽  
Ni Alloys

Nanocrystalline Zn–Ni alloys obtained from a DMH-based bath can be used as replacement of Zn and Cd coatings. The mechanism of better corrosion resistance of Zn–Ni alloys compared to Zn and Cd coatings was analyzed by XPS and EIS.

Microstructures of Ti-1.5 w/o Ni Alloys with Mo and A1 Additions

1975 ◽  
Vol 33 ◽  
pp. 54-55
Author(s):  
Anna C. Fraker
Keyword(s):  
Corrosion Resistance ◽  
Beneficial Effect ◽  
Crevice Corrosion ◽  
Local Corrosion ◽  
Precipitate Size ◽  
Ni Alloys

Small amounts of nickel are added to titanium to improve the crevice corrosion resistance but this results in an alloy which has sheet fabrication difficulties and is subject to the formation of large Ti2Ni precipitates. These large precipitates can serve as local corrosion sites; but in a smaller more widely dispersed form, they can have a beneficial effect on crevice corrosion resistance. The purpose of the present work is to show that the addition of a small amount of Mo to the Ti-1.5Ni alloy reduces the Ti2Ni precipitate size and produces a more elongated grained microstructure. It has recently been reported that small additions of Mo to Ti-0.8 to lw/o Ni alloys produce good crevice corrosion resistance and improved fabrication properties.

scholarly journals Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 517
Author(s):  
Bin Sun ◽  
Lei Cheng ◽  
Chong-Yang Du ◽  
Jing-Ke Zhang ◽  
Yong-Quan He ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Oxide Scale ◽  
Corrosion Product ◽  
Corrosion Behavior ◽  
Corrosion Test ◽  
Atmospheric Corrosion ◽  
Corrosion Mechanism ◽  
Type I ◽  
Rust Layer ◽  
Hot Rolled

The atmospheric corrosion behavior of a hot-rolled strip with four types (I–IV) of oxide scale was investigated using the accelerated wet–dry cycle corrosion test. Corrosion resistance and porosity of oxide scale were studied by potentiometric polarization measurements. Characterization of samples after 80 cycles of the wet–dry corrosion test showed that scale comprised wüstite and magnetite had strongest corrosion resistance. Oxide scale composed of inner magnetite/iron (>70%) and an outer magnetite layer had the weakest corrosion resistance. The corrosion kinetics (weight gain) of each type of oxide scale followed an initial linear and then parabolic (at middle to late corrosion) relationship. This could be predicted by a simple kinetic model which showed good agreement with the experimental results. Analysis of the potentiometric polarization curves, obtained from oxide coated steel electrodes, revealed that the type I oxide scale had the highest porosity, and the corrosion mechanism resulted from the joint effects of electrochemical behavior and the porosity of the oxide scale. In the initial stage of corrosion, the corrosion product nucleated and an outer rust layer formed. As the thickness of outer rust layer increased, the corrosion product developed on the scale defects. An inner rust layer then formed in the localized pits as crack growth of the scale. This attacked the scale and expanded into the substrate during the later stage of corrosion. At this stage, the protective effect of the oxide scale was lost.

Study on corrosion resistance of electroplating zinc-nickel alloy coatings

2009 ◽  
Vol 41 (3) ◽  
pp. 251-254 ◽  
Author(s):  
W. Tian ◽  
F. Q. Xie ◽  
X. Q. Wu ◽  
Z. Z. Yang
Keyword(s):  
Corrosion Resistance ◽  
Nickel Alloy ◽  
Zinc Nickel

scholarly journals Investigation of Corrosion Resistance Enhancement for Biodegradable Magnesium Alloy by Ball Burnishing Process

2020 ◽  
Vol 14 (2) ◽  
pp. 175-183 ◽  
Author(s):  
Chenyao Cao ◽  
Jiang Zhu ◽  
Tomohisa Tanaka ◽  
Dinh Ngoc Pham ◽  
◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Mass Loss ◽  
Immersion Test ◽  
Corrosion Products ◽  
Mg Alloys ◽  
Surface Finishing ◽  
Human Organism ◽  
Corrosion Mechanism ◽  
Ball Burnishing ◽  
Treated Sample

Magnesium and magnesium-based alloys are considered ideal materials for implants in orthopedic treatment because their stiffness is close to that of human bones, and they can be absorbed gradually in the human organism. However, a major issue in their actual application is that the corrosion speed of Mg alloys is very high in aggressive environments such as the human fluids. In previous studies, many approaches have been attempted to enhance the corrosion resistance of Mg alloys. In this research, ball burnishing, a mechanical surface finishing process, is applied to improve the corrosion resistance of Mg alloys by changing its surface properties. The influence of the burnishing parameters on the corrosion resistance is investigated, and the corrosion of a treated and non-treated sample are compared. The test material used is the AZ31 Mg alloy. Firstly, a comprehensive review of the effect of burnishing on the final microstructures is reported. The influence of burnishing on grain size, work-hardened layer thickness, crystal orientation, and residual stress of the sample is discussed. Secondly, by conducting an especially designed long-term immersion test, the mass loss and surface evolution of each sample are evaluated. The experimental results indicate that, under proper processing conditions, the mass loss of the treated sample (8.8 mg) can be reduced to 36% of the non-treated one (24.2 mg). To elucidate the mechanism behind corrosion resistance enhancement by burnishing, the samples treated with the optimal processing parameters found are immersed in an aggressive solution for 1, 3, 5, and 7 days. From the results of mass loss measurement and surface structure characterization, it was found that, among pitting, general, and intergranular corrosion, pitting corrosion is the dominant corrosion mechanism. The holes enlarge because pits combine together, representing the greatest portion of mass loss. The main mechanism enhancing corrosion resistance is the size reduction of the grains on the surface induced by ball burnishing, causing a denser distribution of corrosion products in the immersion test. These corrosion products protect the material underneath accelerated corrosion.

Effect of Aqueous Lithium Bromide Solutions on the Corrosion Resistance and Galvanic Behavior of Copper-Nickel Alloys

CORROSION ◽  
2003 ◽  
Vol 59 (1) ◽  
pp. 32-41 ◽  
Author(s):  
A. Igual Muñoz ◽  
J. García Antón ◽  
J. L. Guiñón ◽  
V. Pérez Herranz
Keyword(s):  
Corrosion Resistance ◽  
Nickel Alloys ◽  
Lithium Bromide ◽  
Copper Nickel ◽  
Aqueous Lithium Bromide ◽  
Bromide Solutions
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