Abstract
Corrosion properties of pulse-plated Zn-Ni alloy coating on a steel substrate were investigated using the neutral salt-spray test (ASTM B 117-81) and the potentiodynamic polarization technique (ASTM G 5-82). Performance of these alloy coatings with various Ni contents (up to 62 wt%) was compared to that of laboratory-prepared electrodeposited Zn coatings and commercial galvannealed (GA) steel. Results of the neutral salt-spray test indicated corrosion resistance of pulse-plated Zn-Ni alloy coatings was superior to that of the pure Zn and commercial GA coating. The Zn-20 wt% Ni and Zn-14 wt% Ni alloys gave the best protection of the Zn-Ni coatings tested. Potentiodynamic polarization tests confirmed excellent corrosion performance of the 20 wt% Ni alloy.
| Original language | British English |
|---|---|
| Pages (from-to) | 880-888 |
| Number of pages | 9 |
| Journal | Corrosion |
| Volume | 52 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1996 |
Keywords
- Alloying
- Coatings
- Corrosion resistance
- Electrochemistry
- Microcracks
- Microstructure
- Nickel
- Potentiodynamic polarization
- Pulse plating
- Salt-spray testing
- Zinc