12. Solving a chemistry problem

1. Draw a diagram of a corrosive element that occurs when metal 1 and metal 2 come into contact in acidic (H2SO4 diluted or HCl) and neutral environments.
2. Comparing the equilibrium electrode potentials of the oxidation and reduction processes, establish whether metal 3 will corrode (oxidize) in an aggressive environment, the composition of which is given in column 4.

Table 2 - Task options

Np/p Metal 1 Metal 2 Metal 3 Characteristics of the medium
1 Iron Nickel Molybdenum pH=4; O2 missing