| P. Cathodic protection | 1. Decarburisation |
| Q. Hydrogen attack | 2. Erosion |
| R. Pilling Bedworth ratio | 3. Galvanising |
| S. Cavitation | 4. Oxidation of metals |
A. P-3, Q-1, R-4, S-2
B. P-3, Q-1, R-2, S-4
C. P-4, Q-2, R-1, S-3
D. P-4, Q-3, R-2, S-1
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Electrometallurgy And Corrosion
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
A. Zn, Fe, Pt, Cu
B. Pt, Zn, Cu, Fe
C. Fe, Pt, Cu, Zn
D. Pt, Cu, Fe, Zn
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