Enhanced corrosion resistance of hydroxyapatite/magnesium-phosphate-composite-coated AZ31 alloy co-deposited by electrodeposition method

A new technique has been developed for improving corrosion resistance on magnesium alloys. Specimens of AZ31 magnesium alloy were dipped into molten salt of NaBF4 at 723 K for various times, and then cooled, rinsed with water, and dried in air. Corrosion resistance in the surface treated specimens was evaluated by salt immersion test using 1 % NaCl solution as a time for occurring filiform corrosion. On an un-treated AZ31 alloy, the time for starting the filiform corrosion was about 1.2 ks, while on the surface treated specimen, the time was prolonged into about 1300 ks. Moreover, the surface treated specimen showed corrosion resistance in low pH solutions, such as 1 % HNO3 and HCl solutions.

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Application of magnesium phosphate coating on low carbon steel via electrochemical cathodic method and investigation of its corrosion resistance

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2015.06.063 ◽

2015 ◽

Vol 647 ◽

pp. 956-958 ◽

Cited By ~ 8

Author(s):

M.R. Dayyari ◽

A. Amadeh ◽

S. Sadreddini

Keyword(s):

Corrosion Resistance ◽

Carbon Steel ◽

Low Carbon Steel ◽

Magnesium Phosphate ◽

Phosphate Coating ◽

Low Carbon

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Comparison of corrosion resistance and biocompatibility of magnesium phosphate (MgP), zinc phosphate (ZnP) and calcium phosphate (CaP) conversion coatings on Mg alloy

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2020.125919 ◽

2020 ◽

Vol 397 ◽

pp. 125919 ◽

Cited By ~ 4

Author(s):

Wei Zai ◽

Xiaoru Zhang ◽

Yingchao Su ◽

H.C. Man ◽

Guangyu Li ◽

...

Keyword(s):

Corrosion Resistance ◽

Calcium Phosphate ◽

Zinc Phosphate ◽

Mg Alloy ◽

Magnesium Phosphate ◽

Conversion Coatings

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Stress corrosion cracking behavior of micro-arc oxidized AZ31 alloy

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219894029 ◽

2019 ◽

Vol 234 (8) ◽

pp. 1640-1652 ◽

Cited By ~ 2

Author(s):

Xiuli He ◽

Hongyu Liang ◽

Zhifeng Yan ◽

Rui Bai

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Stress Corrosion ◽

Stress Corrosion Cracking ◽

Az31 Alloy ◽

Corrosion Cracking ◽

Nacl Solution ◽

Cracking Behavior ◽

Good Corrosion Resistance ◽

Mixed Fracture

The stress corrosion cracking behaviors of micro-arc oxidized AZ31 magnesium alloy were studied by using the slow tensile test in air and 3.5 wt.% NaCl solution. Results showed that compared with the substrate, the stress corrosion cracking susceptibility of the micro-arc oxidized specimens was obvious improved apparently in 3.5 wt.% NaCl solution, due to the good corrosion resistance of the specimens after micro-arc oxidized coating treatment. In addition, regardless of the micro-arc oxidized treatment, it was the mixed fracture in air and the cleavage fracture in 3.5 wt.% NaCl solution. The micro-arc oxidized coating had no direct effect on the fracture mechanism of the alloy. It was closely related to the nature of the material and the environment of the material servicing.

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Electrodeposition of Superhydrophobic Hydroxyapatite/Magnesium Phosphate on a Magnesium Alloy Substrate for Enhanced Corrosion Resistance

International Journal of Electrochemical Science ◽

10.20964/2017.06.01 ◽

2017 ◽

pp. 4654-4663 ◽

Cited By ~ 1

Author(s):

Jiajun Huang ◽

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Magnesium Phosphate ◽

Alloy Substrate

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The influence of direct current density on microstructure and corrosion resistance of magnesium phosphate coating via cathodic electrochemical treatment

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2017.07.040 ◽

2017 ◽

Vol 199 ◽

pp. 537-542 ◽

Cited By ~ 1

Author(s):

M.R. Dayyari ◽

A. Amadeh ◽

S. Sadreddini

Keyword(s):

Corrosion Resistance ◽

Direct Current ◽

Current Density ◽

Electrochemical Treatment ◽

Magnesium Phosphate ◽

Phosphate Coating

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Corrosion Behaviors of Fluoride Treated Cast Magnesium Alloy in Hank’s Solution

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.113 ◽

2016 ◽

Vol 852 ◽

pp. 113-119

Author(s):

Chun Yan Zhang ◽

Ming Bo Yang ◽

Cheng Long Liu

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Az31 Alloy ◽

Second Phase ◽

Magnesium Alloy Az31 ◽

Corrosion Behaviors ◽

Second Phases ◽

Cast Magnesium Alloy ◽

Cast Magnesium ◽

Hank’S Solution

Fluoride conversion films were synthesized on cast magnesium alloy AZ31 by immersion in hydrofluoric acid for different days to improve the corrosion resistance of Mg alloys as degradable implant material. The effects of the films on the corrosion behavior of the mg substrates were investigated by immersion tests. The results showed the fluoride conversion film was affected by the distribution of the chemical component of cast AZ31 alloy and the film on the second phases has more pores and micro-crack, but the bottoms of the pores were also covered by the conversion film and the substrate was not exposed through the pores. The fluoride conversion coatings significantly improved the corrosion resistance of cast AZ31 alloy. The film on the second phase with more pores is the first to dissolve. The most improved corrosion protection was achieved by 15 days treatment with the thickest film in terms of hydrogen evolution rate and damage morphology.

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