Chapter 8 - Corrosion Prevention by Design

Abstract

This chapter discusses how corrosion can be prevented by adopting good design practices. Selection of a corrosion-resistant material for the environment is a prerequisite to a good design. Material and design are both complimentary to each other and neither of the two can be ignored. Some of the factors that influence the service life of equipment are environments and geographic locations, selection of materials, maintenance, design, and bimetallic connection. There are four important stages in the design process: clarifying objectives, establishing functions, setting requirements, and improving details. Welding is the most common method of joining of metals, which has a significant influence on corrosion resistance and design to prevent corrosion. The major problem caused by welds is the creation of an inhomogeneous and discontinuous surface, which creates potential sites for trapping dirt, moisture, and impurities. The readiness rates for track wheel vehicles, aircraft, and weapons stored outside without protection deteriorates at an unacceptable rate of corrosion. It is known that relative humidity below 50% provides the most efficient environment for protection of equipment and material. It prevents rusting of iron and steel without the application of preservatives. Controlled humidity storage is a mandatory requirement for maintenance of expensive and sophisticated army vehicles.