CORROSION PREVENTION
CORROSION PREVENTION
Design considerations and practices for Corrosion Prevention
1. The interrelation of various materials within a material system that can
influence the corrosion process
2. The configuration of the material system as it affects the presence and
conditions of a corrodent
3. The functioning of the operating system as it influences the generation and
distribution of stress, erosion, and wear
4. Active corrosion prevention systems that can only be incorporated into the
system design.
First, a designer must examine the array of materials that comprise a complex
item. Next the designer assesses the potential for interaction
considering the external environments of transportation, storage, and use
together with the internal environments of working fluids, consumable materials,
and residual products. The characteristics that influence material compatibility
are
1.The component metals and other materials of construction and the galvanic
relationships they may establish
2. The relative size of anode to cathode in corroding couples
3. The geometric relationship of and the dimensions defining dissimilar
materials
4. The degree and extent of exposure to corrosive environments
5. The electrical
and electrochemical properties of the environment and corroding couples
6. The thermal properties and temperature variations
7. The fluid flow characteristics
8. The chemical compositions of aggressive agents in solvent waters and other
media
9. The sources and conductive paths of stray direct currents
10. The development of corrosive reactant products
11. The impact of the effect on performance
12. The criticality of possible failures.
see also
Stainless Steel Corrosion Prevention
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