| 摘要 |
<p>A method is described for removing corrosion products formed in situ, transported corrosion products, iron staining from water, which resides on fixtures, and unwanted materials trapped within and/or in association with corrosion products from iron, steels, and copper, alloys of these metals and from other surfaces, specifically including glasses, plastics, elastomers, ceramics, tiles and porcelains. The method comprises contacting corroded sufaces and/or surfaces supporting corrosion products with an aqueous composition containing citric acid or its salts, at least one organophosphonate or its salts, and at least one water-soluble polymer or its salts. A corrosion inhibitor may be included in the composition. One or more alkali metal or alkaline earth metal or ammonium hydroxides may be included for adjusting the pH, and/or for controlling the kinetics of the removal method. Enhancements such as abrasives, coloring agents and odorizers may also be included.</p> |
