Stainless steel electrochemical passivation solution as well as preparation method and application thereof

The invention relates to the technical field of stainless steel passivation, in particular to a stainless steel electrochemical passivation solution as well as a preparation method and application thereof, and the stainless steel electrochemical passivation solution comprises the following components in percentage by weight: 0.1-2.4% of a complexing agent, 0.5-1.0% of a corrosion inhibitor, 0.1-0.3% of an accelerant, 0-1.0% of sodium metasilicate, 0-0.3% of octadecyl trimethoxy silane and the balance of a solvent. The pH value of the passivation solution is 3-4, and the passivation solution is environmentally friendly, does not contain nitric acid, phosphoric acid and other strong acids, can meet the requirements of stainless passivation, improves the corrosion resistance, uses electric energy to replace the oxidation energy of chemical substances, and is better in liquid medicine stability and more compact and uniform in passivation film; the use method of the passivator is simple, the electrochemical deposi