| 摘要 |
<p>In order to protect free surfaces, especially steel surfaces against corrosion, a water layer is applied thereto, binding it to the surface by means of a gel-forming hydrophilic material which is essentially insoluble in water. The hydrophilic material is preferably a polymer or an inorganic, gel-forming composition. The method may be used for protection of offshore constructions, ships, the ballast tanks of ships, iron and steel pipelines, and the like. It may also be used to coat the interior of asbestos cement pipe to prevent asbestos pollution of a liquid to be conducted by the pipe.</p> |
