Abstract
A cathodic arc plasma ion plating process was demonstrated to deposlt deposit Ni-Al film on AISI 1045 carbon steel to evaluate the cavitation protection. Three target materials with Ni52Al48, Ni60Al4o, and Ni70Al30 compositions were used to reveal the microstructural of coatings. Experimental results show that the nickel content in these deposits increased with the nickel contenof the target material. The major phase of deposited film was NigAl regardless of the target materials. All of the as- deposited films presented very strong adhesion and reflects their cavitation erosion behavior in fresh water. All coatings increased the cavitation erosion resistance of the baresubstrate 10 fold. These coatings also enhanced the cavitation resistance 2-fold or greater in 3.5 wt.%NaCl and 3-fold in 3.5 wt. % HCl electrolyte. The potentiodynamic polarization data ofcoated specimens in these two electrolytes indicated that the coated specimens exhibited highercorrosion potential and lower corrosion current density than the bare substrate material. It is believed that the cavitation erosion induced pitting corrosion into the substrate accelerated the massloss rate of the substrate.
Keywords
Ni-Al intermetallic coatings, Ni3Al, Cavitation erosion, Potentiodynamic polarization
Publication Date
2003-05-28
Online Available Date
2003-05-28
Revised Date
2003-05-20
Received Date
2002-12-30
Recommended Citation
J-t CHANG, H-c Yeh, J-l HE, K-c CHEN.
Cavitation Erosion Behavior of Ni-Al Intermetallic Coatings[J]. Journal of Electrochemistry,
2003
,
9(2): 156-163.
DOI: 10.61558/2993-074X.1499
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol9/iss2/6
