| 摘要 |
<p>The invention relates to a method for inhibiting corrosion (18) in the arch of a pipe (10) carrying a multiphase corrosive liquid comprising a liquid phase (12) which flows off at the lower part of the pipe (10) and a gaseous phase (14) which flows off at the upper part of said pipe. The method consists in the following: a scraper(16) is introduced into said pipe, sealing means (27) are provided between the scraper (16) and the inner wall of the pipe in such a way that the scraper is moved along the pipe from top to bottom as a result of the effect of the pressure difference between the top and bottom, a liquid that inhibits corrosion is introduced into the scraper or said liquid is injected into the pipe where it is mixed with the liquid phase (12), the scraper is provided with means (22) that enable the corrosion-inhibiting liquid contained in the scraper or the mixture contained in the pipe to be taken up, whereby said liquid is projected onto the inner wall of the arch of the pipe as the scraper advances in said pipe.</p> |
