MTRL $456$ Spring $2024$

Homework Assignment #$5[25$ points$]$

Provide neat, orderly concise yet complete answers to each of the following questions. Partial or full credit can only

be awarded if the route to the answer is clear. Place final quantitative answers in a box for full credit.

When ferric chloride $(FeC{l}_3)$ is progressively added to deaerated water in contact with stainless steel,

the following observations are made: $($a$)$ for small additions, the corrosion rate increases; $($b$)$ for

intermediate additions, the corrosion rate suddenly decreases; and $($c$)$ for larger additions, pitting

corrosion occurs. Use appropriate polarization curves to explain these observations. $[6$ pts$]$