in the corrosion process by evolution of hydrogen. ...
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H2 gas liberates in the form of bubbles near the cathode. Thus, hydrogen evolution type of corrosion is nothing but displacement of H+ from acidic solution by metal ions. All the metals above H2 in the electro chemical series get dissolved in acidic solution with simultaneous evolution of hydrogen.
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Evolution of Hydrogen Electrochemical corrosion with evolution of H2 occurs in acidic Environment At anode Fe →Fe2+ + 2e-(oxidation /corrosion) At cathode 2H+ + + 2e-→H2 Overall reaction Fe +2H+ →Fe Explanation (1) Iron tank which acts as an anode undergoes corrosion as Fe atoms from the tank pass into the acidic ...
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