Laser Cladding and Thermal Spray Coatings on Steel Pipe Serving the Oil and Gas IndustryAlmeida NC1, Candido LC1, Faria GL1, Fernandes de Lima MS1,2 and Trindade VB1*
- *Corresponding Author:
- Trindade VB
Redemat/Federal University of Ouro Preto, Brazil
Tel: 31 35591324
E-mail: [email protected]
Received Date: May 17, 2016; Accepted Date: September 07, 2016; Published Date: September 17, 2016
Citation: Almeida NC, Candido LC, Faria GL, Fernandes de Lima MS, Trindade VB (2016) Laser Cladding and Thermal Spray Coatings on Steel Pipe Serving the Oil and Gas Industry. J Material Sci Eng 5: 279. doi:10.4172/2169-0022.1000279
Copyright: © 2016 Almeida NC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Different coating systems were characterized using a commercial API 5CT steel grade L80 type 1, which is commonly used in the oil and gas industry. Two Ni-based alloys and one Co-based alloy were deposited by laser cladding. Two coatings were deposited (Ni-based alloy and a composite W-C/Co-base) by means of thermal spray process. It has been shown the presence of a hard heat affected zone (HAZ) in the substrate for the as-laser deposited coating. The main explanation for this HAZ is devoted to the heat gradient causing a gradient on the prior austenite grain size and consequently different martensite hardness along the HAZ. For the thermal sprayed coatings, no HAZ was formed due to low heat input process. All the studied coating systems seem to be very interesting for different technically demanding applications, such as, stress sulfide corrosion and wear resistance.