Metal Susceptibilities to Uniform Corrosion

Magnesium and low alloy ferrous alloys are by far the most susceptible metals to uniform corrosion as shown in Figure 7. Additional metal classes, not addressed in the figure, normally have negligible uniform atmospheric corrosion rates. For the susceptible metals, increased alloying with specific elements can increase uniform corrosion resistance. Alloying for general corrosion resistance of the different metal classes is covered in Section 4.0,

Corrosion Characteristics and Properties of Metals. Alloying should also consider the environmental composition and degree of corrosivity. The relative uniform corrosion susceptibilities of a steel piling exposed to marine environments are shown in Figure 8.