Formation Mechanism and Corrosion Performance of Phosphate Conversion Coatings on AZ91 and Mg-Gd-Y-Zr Alloy
Source abstract
Abstract
The microstructure, phase composition and corrosion resistance of phosphate conversion coating (PCC) on AZ91D and Mg-Gd-Y-Zr alloy were investigated to understand the coating formation mechanism. It was found that the Volta potential difference between the second phase and α-Mg provides the main driving force for deposition of MgHPO 4 inner layer. Mg dissolution rate is accelerated in Mg-RE (where RE represents rare earth elements) alloy at the beginning of the treatment, leading to formation of a dense and protective conversion coating on Mg-RE compared to AZ91D Mg. Electrochemical noise signals and H 2 evolution rate (HER) obtained during coating formation process were used to investigate and predict the microstructure and corrosion performance of the conversion coatings. A dense and protective conversion layer is produced if the noise resistance is high and HER is relatively low in the final stage of coating growth.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Corrosion Behavior and Inhibition · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. 10.1016/j.jmst.2016.07.00110.1016/j.jmst.2016.07.001 ↗
2. 10.1149/2.0801609jes10.1149/2.0801609jes ↗
3. 10.1016/j.pmatsci.2017.04.01110.1016/j.pmatsci.2017.04.011 ↗
4. 10.1016/j.corsci.2018.05.01910.1016/j.corsci.2018.05.019 ↗
5. 10.1016/j.corsci.2014.03.02110.1016/j.corsci.2014.03.021 ↗
6. 10.1016/j.electacta.2015.11.03310.1016/j.electacta.2015.11.033 ↗
7. 10.1016/j.surfcoat.2016.08.05510.1016/j.surfcoat.2016.08.055 ↗
8. 10.1016/j.surfcoat.2018.01.02210.1016/j.surfcoat.2018.01.022 ↗
9. 10.1016/j.corsci.2016.10.01710.1016/j.corsci.2016.10.017 ↗
10. 10.1149/1.184537110.1149/1.1845371 ↗
11. 10.1016/j.corsci.2009.02.00710.1016/j.corsci.2009.02.007 ↗
12. 10.1016/j.actbio.2013.11.01610.1016/j.actbio.2013.11.016 ↗
13. 10.1016/j.surfcoat.2014.06.03010.1016/j.surfcoat.2014.06.030 ↗
14. 10.1149/1.361143010.1149/1.3611430 ↗
15. 10.1016/j.corsci.2014.08.00710.1016/j.corsci.2014.08.007 ↗
16. 10.1149/2.1021609jes10.1149/2.1021609jes ↗
17. 10.1149/2.059311jes10.1149/2.059311jes ↗
18. 10.1016/j.electacta.2007.08.01510.1016/j.electacta.2007.08.015 ↗
19. 10.1016/j.scriptamat.2008.06.05910.1016/j.scriptamat.2008.06.059 ↗
20. 10.1016/j.electacta.2009.06.04810.1016/j.electacta.2009.06.048 ↗
21. 10.1016/j.surfcoat.2010.11.02710.1016/j.surfcoat.2010.11.027 ↗
22. 10.1016/j.corsci.2013.05.00510.1016/j.corsci.2013.05.005 ↗
23. 10.1149/1.216478710.1149/1.2164787 ↗
24. 10.1149/2.091205jes10.1149/2.091205jes ↗
25. 10.1149/2.020302jes10.1149/2.020302jes ↗
26. 10.1016/j.corsci.2017.10.01410.1016/j.corsci.2017.10.014 ↗
27. 10.1098/rspa.1998.019310.1098/rspa.1998.0193 ↗
28. 10.1016/j.electacta.2013.04.08510.1016/j.electacta.2013.04.085 ↗
29. 10.1016/j.corsci.2012.09.00710.1016/j.corsci.2012.09.007 ↗
30. 10.1016/j.electacta.2014.05.10210.1016/j.electacta.2014.05.102 ↗
31. 10.1016/j.electacta.2013.11.08410.1016/j.electacta.2013.11.084 ↗
32. 10.1016/j.corsci.2018.02.05110.1016/j.corsci.2018.02.051 ↗
33. 10.1016/j.corsci.2007.11.00510.1016/j.corsci.2007.11.005 ↗
34. 10.1016/j.corsci.2010.08.00610.1016/j.corsci.2010.08.006 ↗