Copied and pasted
Citric acid helps precipitation of iron by ammonia by forming a complex with it. – Ammonia + Citric Acid + Thioglycolic Acid + Iron reacts to form ferric thioglycolate, which is red/purple in colour (Hence the ‘bleeding’ effect.). Thioglycolic acid helps to oxidize iron (II) to iron (III). – Accelerates oxidation process turning wustite (Mineral found in iron ore) into ferric oxide (rust) very quickly. This is a controlled corrosion process, or essentially, acid pickling. Ammonia to make solution alkaline – Adding an alkaline to the thioglycolic acid makes it very nearly pH-neutral in solution (In the bottle), until it contacts iron when an acidic reaction will start to take place, lowering the pH of the product in use.
Read the original article at: https://www.detailingwiki.org/decont.../#How_it_works
Bookmarks