Erosion-Corrosion of Coatings and Superalloys in High-Velocity Hot Gases

2009 ◽  
pp. 163-163-30 ◽  
Author(s):  
RH Barklow ◽  
JA Goebel ◽  
FS Pettit
Keyword(s):  
High Velocity ◽  
Erosion Corrosion

Erosion-corrosion behaviors of high velocity arc sprayed Fe−Al/Cr3C2 coating

2006 ◽  
Vol 21 (3) ◽  
pp. 29-31 ◽  
Author(s):  
Xu Weipu ◽  
Xu Binshi ◽  
Zhang Wei ◽  
Wu Yixiong
Keyword(s):  
High Velocity ◽  
Erosion Corrosion ◽  
Corrosion Behaviors

Effects of Erosion Rate on the Erosion-Corrosion Synergism of High Velocity Oxy-Fuel Sprayed Ni-Based Coatings

2008 ◽  
Vol 373-374 ◽  
pp. 585-588 ◽  
Author(s):  
An Feng Zhang ◽  
Yu Yue Wang ◽  
Chang Jiu Li
Keyword(s):  
High Velocity ◽  
Erosion Rate ◽  
Steel Substrate ◽  
Silica Sand ◽  
Volume Loss ◽  
Low Carbon ◽  
Hvof Spraying ◽  
Two Phase ◽  
Erosion Corrosion ◽  
Loss Rates

Two types of Ni-based coatings were deposited by high velocity oxy-fuel (HVOF) spraying process on ASTM 1020 low carbon steel substrate, and AISI 321 stainless steel was applied to the contrast test. The influences of erosion rate on the erosion-corrosion synergism and erosion-wear mechanism of the two coatings were investigated systematically in a liquid/solid two-phase flow (5% H2SO4 +15% silica sand). The volume loss rates stemming from the erosion-corrosion synergism of materials increased from 42~66% to 78~85% of the total volume loss rates when the erosion rate of the flow increased from 5 m/s to 10 m/s. It was indicated that the erosion-corrosion synergism was primary for the material removing during the erosion-corrosion process. Cutting, wear and plowing were the main features for Type-A coatings, while cutting, plowing and plastic deformation were the main characters for Type-B coatings and the two steels.

scholarly journals Erosion Corrosion Study of HVOF Sprayed Thermal Sprayed Coatings on Boiler Tubes:A Review

2018 ◽  
pp. 1-6
Author(s):  
Rakesh Kumar ◽  
Rajesh Kumar ◽  
Santosh Kumar
Keyword(s):  
High Velocity ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Economic Losses ◽  
Material Surface ◽  
Basic Principles ◽  
Erosion Corrosion ◽  
Sprayed Coating ◽  
Sprayed Coatings ◽  
Thermal Sprayed Coatings

Many industrial parts used in power generation industries fail due to erosion, corrosion, and abrasion causes huge economic losses. These problems can be overcomeby either changing the materialor changing the environment or by separating the material surface from the corrosive environment. The distinct investigations have been carried out to overcome the erosion problems and observedthat erosion resistant coatings have been gaining more importance in recent times. Among the different thermal spray coating techniques, High Velocity Oxy Fuel (HVOF)has emerged as an effective, advancedand rapidly developing processto produce dense coating at relatively low temp.withlow porosity (less than 1%). HVOF has been widely adopted by many industries due to its several advantages such as high micro-hardness, adhesion strength, and erosion-corrosion and wear resistance, flexibility, and cost effectiveness with homogenous coating. The main purpose of this review paper is to reviewprevious research in the field of high velocity Oxy-fuel (HVOF)sprayed coating,especially in context with Indian boilertubes. In addition,an attempt has been made to study their basic principles, merits, demerits, applications and comparison.

Sign in / Sign up

Export Citation Format

Share Document