I have never seen Acetic Acid in the info for Salt Away. I had looked for the make up of it some years ago but could not find anything apart from detergent. The detergent could well be simply Glycol. In thius case, detergents act mainly as a " wetting" agent. Reducing surface tension and allowing the Water to " attach" to surfaces.
If acetic acid that is the case, I scratch my head as to how the "corrosion protectant" part is supposed to work.
Plus Acetic Acid is a poor choice for cleaning crud in Salt Envirnoments.
And in saying that, Phosphoric would work, but is not a lot better. Alt