Zinc rod is immersed in dilute HCl (pure). If a very small amount of FeCl3 is added to the solution, the corrosion rate of zinc
A. decreases
B. increases
C. remains constant
D. is zero (possivation)
Answer: Option D
A. decreases
B. increases
C. remains constant
D. is zero (possivation)
Answer: Option D
Intergrannular corrosion of light 18-8 stainless steel can not be prevented by
A. reducing the carbon content to less than 0.05%
B. quenching it from high temperature to prevent chromium carbide precipitation
C. adding strong carbide forming elements
D. increasing the carbon content
Which of the following metals is highest noble in the Galvanic series?
A. Platinum
B. gold
C. graphite
D. titanium
Difficult to monitor and very dangerous form of corrosion
A. Galvanic
B. Pitting
C. Crevice
D. Stress
A. Zn, Fe, Pt, Cu
B. Pt, Zn, Cu, Fe
C. Fe, Pt, Cu, Zn
D. Pt, Cu, Fe, Zn
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