Abstract
Ni-P alloy coatings were deposited with the addition of Yb 3+ in the electroless plating solution. The effects of Yb 3+ concentration on the corrosion resistance and deposition rate of electroless Ni-P coatings were investigated. The results showed that the addition of Yb 3+ could significantly improve the corrosion resistance of the coatings. When increasing Yb 3+ up to 0.20 g L -1 , the corrosion potential E corr of the electroless Ni-P coating in 3.5% NaCl solution increased from -0.381 to -0.08 V, and the corrosion current density I corr decreased from 7.36 to 0.62 μA cm -2 . At 0.20 g L -1 Yb 3+ , the coating could be as long as 960 h free of corrosion in the neutral salt spray. In addition, the deposition rate can also be accelerated by Yb 3+ addition. The mechanisms of Yb 3+ influencing on the corrosion resistance and deposition rate of electroless Ni-P coatings were discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 2176-2179 |
| Number of pages | 4 |
| Journal | Applied Surface Science |
| Volume | 255 |
| Issue number | 5 PART 1 |
| DOIs | |
| State | Published - 30 Dec 2008 |
Keywords
- Corrosion resistance
- Deposition rate
- Electroless plating
- Ni-P coating