1. Introduction to Corrosion

1.3 Corrosive Environment

Corrosion cannot be defined without a reference to environment. All environments are corrosive to some degree. Following is the list of typical environments


Air and humidity

Fresh, distilled, salt and marine water

Natural, urban, marine and industrial atmospheres
Steam and gases, like chlorine, ammonia, Hydrogen sulfide
Acids, Alkalies, Soils

Sulfur dioxide and oxides of nitrogen

Fuel gases


 It may, therefore, be observed that corrosion is a potent force which destroys economy, depletes resources and causes costly and untimely failures of plants, equipment and components.