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01182 PERFORMANCE OF THERMAL SPRAY COATINGS UNDER WASTE INCINERATION CONDITIONS

Picture for 01182 PERFORMANCE OF THERMAL SPRAY COATINGS
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Product Number: 51300-01182-SG
ISBN: 01182 2001 CP
Author: M. Spiegel and R. Warnecke
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The paper presents results and analysis of corrosion experiments of APS (Atmospheric Plasma Spraying) and HVOF-sprayed (High Velocity Oxide Fuel) coatings under simulated waste incineration environments. Coupons of 15 Mo 3 were coated with different materials, predominantly Alloy 625 based compositions, embedded in a KCI-ZnCl2-PbCI2 salt mixture and reacted at 350 °C for 360h in N2-5 vol.% O2-1000 vppm HCI gas with and without additions of SO2. In general, the corrosive attack of the Alloy 625 coatings is less than that of the 15 Mo 3 reference material. It was found that Alloy 625 coatings, applied by APS are less protective than HVOF-sprayed coatings. The reason for this is the lower chromium content and the higher amount of oxide phases, which are preferentially attacked. Nickel-based coatings with a low amount of oxide phases, more than 20 wt. % chromium and silicon additions are most protective. The addition of SO2 decreases the corrosive attack on every material.
The paper presents results and analysis of corrosion experiments of APS (Atmospheric Plasma Spraying) and HVOF-sprayed (High Velocity Oxide Fuel) coatings under simulated waste incineration environments. Coupons of 15 Mo 3 were coated with different materials, predominantly Alloy 625 based compositions, embedded in a KCI-ZnCl2-PbCI2 salt mixture and reacted at 350 °C for 360h in N2-5 vol.% O2-1000 vppm HCI gas with and without additions of SO2. In general, the corrosive attack of the Alloy 625 coatings is less than that of the 15 Mo 3 reference material. It was found that Alloy 625 coatings, applied by APS are less protective than HVOF-sprayed coatings. The reason for this is the lower chromium content and the higher amount of oxide phases, which are preferentially attacked. Nickel-based coatings with a low amount of oxide phases, more than 20 wt. % chromium and silicon additions are most protective. The addition of SO2 decreases the corrosive attack on every material.
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04022 Experiences on Thermal Spray Aluminum (TSA) Coating for Offshore Structures

Product Number: 51300-04022-SG
ISBN: 04022 2004 CP
Author: Desmond K.K. Tiong, Shell International; Halimah Pit, Sarawak Shell Berhad
Publication Date: 2004
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Since 1982, there has been a move to Thermal Sprayed Aluminum (TSA) coating in the “splash zone” of offshore structures.  Our experience indicates that an experience applicator, good surface preparation and quality of wire combined to achieve required thickness and apply the sealer to seal the entire surface.

 
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