The effect of pure aluminum cold spray coating on corrosion and corrosion fatigue of magnesium (3% Al-1% Zn) extrusion

Pure aluminum powder was successfully sprayed on AZ31B extrusion flat and round coupons at low temperature. The corrosion and corrosion fatigue behavior of the coated and uncoated samples were examined by performing accelerated corrosion tests. The corrosion resistance of AZ31B samples with and with...

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Bibliographic Details
Published in:Surface & coatings technology 2017-01, Vol.309, p.423-435
Main Authors: Diab, Mohammad, Pang, Xin, Jahed, Hamid
Format: Article
Language:English
Subjects:
Accelerated tests
Aluminum coatings
Aluminum powders
AZ31B extrusion
Bending fatigue
Bending machines
Coating effects
Cold spray
Corrosion
Corrosion effects
Corrosion fatigue
Corrosion prevention
Corrosion resistance
Corrosion tests
Crack propagation
Cyclic loads
Extrusion
Fatigue cracking
Fatigue failure
Fatigue life
Fatigue strength
Fatigue tests
Fracture mechanics
Localized corrosion
Magnesium
Microstructure
Protective coatings
Pure aluminum
Relative humidity
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Summary:Pure aluminum powder was successfully sprayed on AZ31B extrusion flat and round coupons at low temperature. The corrosion and corrosion fatigue behavior of the coated and uncoated samples were examined by performing accelerated corrosion tests. The corrosion resistance of AZ31B samples with and without coating was investigated based on ASTM B117 standard salt spray with a concentration of 5% NaCl at 36°C, 100% relative humidity. The corrosion fatigue of bare and coated round samples was examined by producing a thin film of 3.5% NaCl solution on the surface of the fatigue samples via integrating a corrosion chamber into a rotating bending fatigue testing machine. Pure Al coating provided significant corrosion protection for AZ31B in 5% NaCl fog environment by improving its corrosion resistance from 90% average weight loss in 33days for bare samples to
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2016.11.014