An exploratory study of the corrosion of Mg alloys during interrupted salt spray testing

2009 ◽  
Vol 51 (6) ◽  
pp. 1277-1292 ◽  
Author(s):  
Ming-Chun Zhao ◽  
Patrik Schmutz ◽  
Samuel Brunner ◽  
Ming Liu ◽  
Guang-ling Song ◽  
...  
Keyword(s):  
Exploratory Study ◽  
Salt Spray ◽  
Mg Alloys ◽  
Salt Spray Testing

scholarly journals The Effect of Sn Addition on Zn-Al-Mg Alloy; Part II: Corrosion Behaviour

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5290
Author(s):  
Zuzana Gabalcová ◽  
Peter Gogola ◽  
Martin Kusý ◽  
Henrich Suchánek
Keyword(s):  
Intergranular Corrosion ◽  
Corrosion Behaviour ◽  
Salt Spray ◽  
Xrd Analysis ◽  
Corrosion Products ◽  
Mg Alloys ◽  
Mg Alloy ◽  
Corrosion Properties ◽  
Alloy Part ◽  
Salt Spray Testing

Corrosion behaviour of Sn (0.0, 0.5, 1.0, 2.0 and 3.0 wt.%)-doped Zn 1.6 wt.% Al 1.6 wt.% Mg alloys exposed to salt spray testing was investigated. Intergranular corrosion was observed for all alloys in both as-cast and annealed states. However, due to microstructure spheroidisation in the annealed samples, potential intergranular corrosion paths are significantly reduced. Samples with 0.5 wt.% of Sn showed the best corrosion properties. The main corrosion products identified by XRD analysis for all samples were simonkolleite and hydrozincite. Occasionally, ZnO and AlO were identified in limited amounts.

Study of Microstructure and Corrosion Resistance of Zinc Electrodeposits before and after Black Chromating

2017 ◽  
Vol 751 ◽  
pp. 119-124
Author(s):  
Kanokwan Saengkiettiyut ◽  
Pranee Rattanawaleedirojn ◽  
Adisak Thueploy ◽  
Jumpot Wanichsampan ◽  
Yuttanant Boonyongmaneerat
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Alkaline Electrolyte ◽  
Corrosion Properties ◽  
Electrochemical Testing ◽  
Before And After ◽  
Coat Layer ◽  
Zinc Coatings ◽  
Salt Spray Testing

In this work, microstructure and corrosion properties of zinc electroplated steel before and after black chromating was investigated. The test samples were prepared by electrodeposition process, using a commercially-available alkaline electrolyte. Subsequently, the galvanized samples were applied with a black chromate-based passivation layer and a clear top-coat layer. Their microstructures were examined using X-ray diffractometry and scanning electron microscopy. The corrosion resistance of the samples was assessed with the salt spray test, following the ASTM B117, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization in 5 wt.% NaCl solutions. The study showed that zinc electroplated steels exhibit (110) crystallographic orientation. The passivation and top-coat layers did not affect the microstructure of the zinc layer, and covered uniformly on the zinc layer for all sets of samples. The corrosion resistant results obtained from salt spray testing and electrochemical testing revealed that the microstructure of zinc coatings prepared by using different applied current did not influence on their corrosion resistance markedly. While black passivation followed by top coating provided a significant improvement on corrosion resistance of the coatings.

Selected Bibliography on Salt Spray Testing 1935–1946★

CORROSION ◽  
1948 ◽  
Vol 4 (10) ◽  
pp. 492-504 ◽  
Author(s):  
Lorraine R. Voigt
Keyword(s):  
Salt Spray ◽  
Salt Spray Testing
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