This general class covers the degradation of materials by bacteria, molds and fungi or their by-products. It can occur by a range of actions such as:
- Attack of the metal or protective coating by acid by-products, sulphur, hydrogen sulphide or ammonia
- Direct interaction between the microbes and metal which sustains attack.
Prevention
Prevention can be achieved by:
- Selection of resistant materials
- Frequent cleaning
- Control of chemistry of surrounding media and removal of nutrients
- Use of biocides
- Cathodic protection.
No comments:
Post a Comment