Protecting Metals from Corrosion

Ideally, a material which is inherently resistant to its service environment, meets with the mechanical, formability and economic requirements would be the first choice for selection. Unfortunately, this is not often the case. Many materials will need a method of corrosion control and there are three main approaches:

1. Modification of the environment to which the material is exposed
2. Electrical methods of control
3. Use of protective coatings

Thermal Spray Coatings for Corrosion Protection

Thermal spray coatings are widely used in preventing corrosion of many materials, with very often, additional benefits of properties such as wear resistance etc.. due to the very wide selection of coatings that can be sprayed. Broadly, thermal spray powder coatings fall into three main groups:

1. Anodic Coatings
2. Cathodic Coatings
3. Neutral Coatings