Preparation and Characterization of Synchronous Chemical Conversion Coating on 6061 Aluminum Alloy/7075 Aluminum Alloy/Galvanized Steel Substrates
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. OCP Measurements during the Formation of Conversion Coating
3.2. Electrochemical Analysis
3.3. Surface Characterization
3.4. EPMA Analysis
3.5. XPS Analysis
3.6. Discussion of the Formation of Synchronous Chemical Conversion Coatings
- A.
- The dissolution of Al or Zn/Fe on the substrate surface in a conversion bath [45].
- B.
- C.
- The dissolution of the micro anode and the formation of conversion coatings in the micro cathode region reach a dynamic equilibrium.
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Samples | icorr/μA·cm−2 | Ecorr/V | Rct/Ω | Rs/Ω | Rf/Ω | Q1 | Q2 |
---|---|---|---|---|---|---|---|
with conversion AA6061 | 0.174 | −1.084 | 84610 | 8.66 | 3675 | 6.317 × 10−5 | 9.334 × 10−5 |
without conversion AA6061 | 1.096 | −1.151 | 0.268 | 12.97 | 919 | 8.661 × 10−4 | 6.221 × 10−4 |
with conversion AA7075 | 0.018 | −0.603 | 23250 | 7.03 | 2876 | 9.112 × 10−5 | 3.666 × 10−5 |
without conversion AA7075 | 1.470 | −0.653 | 19330 | 11.64 | 799 | 7.663 × 10−4 | 2.729 × 10−4 |
with conversion galvanized steel | 1.012 | −0.838 | 13010 | 6.07 | 2017 | 1.117 × 10−4 | 3.915 × 10−4 |
without conversion galvanized steel | 6.312 | −0.938 | 5441 | 9.88 | 366 | 7.664 × 10−4 | 9.226 × 10−3 |
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Zhan, W.; Li, X.; Qian, X.; Li, Y.; Ding, Y.; Zu, Y.; Xie, F.; Tian, F. Preparation and Characterization of Synchronous Chemical Conversion Coating on 6061 Aluminum Alloy/7075 Aluminum Alloy/Galvanized Steel Substrates. Metals 2022, 12, 2011. https://doi.org/10.3390/met12122011
Zhan W, Li X, Qian X, Li Y, Ding Y, Zu Y, Xie F, Tian F. Preparation and Characterization of Synchronous Chemical Conversion Coating on 6061 Aluminum Alloy/7075 Aluminum Alloy/Galvanized Steel Substrates. Metals. 2022; 12(12):2011. https://doi.org/10.3390/met12122011
Chicago/Turabian StyleZhan, Wen, Xinxiang Li, Xuzhen Qian, Yingpeng Li, Yunhu Ding, Yunhe Zu, Fan Xie, and Feng Tian. 2022. "Preparation and Characterization of Synchronous Chemical Conversion Coating on 6061 Aluminum Alloy/7075 Aluminum Alloy/Galvanized Steel Substrates" Metals 12, no. 12: 2011. https://doi.org/10.3390/met12122011