engineering recuitment NMDC Maintenance Assistant Fitter 2021 Mock Test Fitter Coatings

Which among the following are ways for prevention of corrosion?

1. Galvanizing

2. Tinning

3. Anodization

4. Electroplating

5. Alloying

1
1, 2 and 4 only
2
1, 2 and 3 only
3
2 and 5 only
4
All of the above
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