What are the methods to improve the wear and corrosion resistance of grey cast iron rotors? 

To improve the wear and corrosion resistance of grey cast iron rotors, several methods can be used. One method is to apply a thermal spray coating using nickel-chromium (Ni-Cr) as the coating material . Another method is to subject the cast iron surface to a water jet treatment, followed by nitrocarburizing and the application of an oxide layer . Additionally, activation of the cast iron substrate using a pulsed water jet can increase the surface roughness, which enhances the adhesion of subsequent layers such as the diffusion layer and the thermally sprayed top layer . Furthermore, the wear resistance of grey cast iron can be increased by sulfocyanation in molten salts, which forms a hard carbonitride layer and a layer of iron sulfides acting as a lubricant . These methods aim to enhance the wear and corrosion resistance of grey cast iron rotors, ensuring their durability and performance in various applications.

Corrosion Behaviour of Nodular Cast Iron Used for Rotor Manufacturing in Different Wastewaters

The provided paper does not discuss methods to improve the wear and corrosion resistance of grey cast iron rotors.

Method to produce cast iron brake discs with high corrosion and wear resistance

The paper describes a method to improve the wear and corrosion resistance of cast iron brake discs by subjecting the surface to water jet treatment, applying a diffusion layer by nitrocarburizing, and applying an oxide layer on top.

To Improve Wear Resistance of Cast Iron Deposited by Detonation Sprayed Ni-Cr Coating

The provided paper does not specifically mention methods to improve the wear and corrosion resistance of grey cast iron rotors. The paper focuses on using thermal spray coating methods with nickel-chromium (Ni-Cr) to enhance the wear resistance of cast iron.

Increasing wear resistance of the protective bush-ing of the centrifugal pump made of gray cast iron by chemical-thermal treatment

The provided paper does not mention any methods to improve the wear and corrosion resistance of grey cast iron rotors.