Due to the lack of salts capable of forming a protective film in distilled water, its corrosion effect on the zinc coating is significant, second only to rainwater, slightly higher than soft water, and approximately three-quarters of the corrosion rate in tap water.
If such distilled water exists as an extremely thin water film on the surface of the zinc coating, the oxygen content in the water film will be the highest, leading to the most severe corrosion in this scenario.
Generally speaking, the corrosion rate of zinc coating in distilled water ranges from 50 to 200 milligrams per square decimeter per day.
