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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.44  No.2 (2003)  >  pp.253-258

MATERIALS TRANSACTIONS
<<Previous article Vol.44  No.2 (2003)   pp.253 - 258 Next article>>

Corrosion Resistance of HastelloyC Coatings Formed by an Improved HVOF Thermal Spraying Process

Jin Kawakita1), Seiji Kuroda1), Takeshi Fukushima1) and Toshiaki Kodama1)
1) National Institute for Materials Science

The corrosion resistance of coatings obtained by an improved HVOF spraying method was evaluated by various electrochemical techniques. This spraying system could increase the flight velocity of sprayed particles and suppress their oxidation simultaneously by attachment of a gas shroud, employing nitrogen gas at a large flow rate. The process brought about attainment of both smaller porosity and lower oxide content of the resulting coatings. Consequently, the resistance of HVOF sprayed coatings against seawater corrosion was improved considerably.


Keyword:
high velocity oxy-fuel (HVOF), HastelloyC, gas shroud, corrosion resistance, seawater

Received: July 22, 2002
Accepted: November 08, 2002 , Published online: September 06, 2005
Copyright (c) 2005 Japan Thermal Spraying Society

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