Corrosion of gasoline cooler tube bundle
Thread Content
Corrosion of heat exchangers in the petrochemical industry restricts the safe production of production equipment. The picture above is a sample tube for physical and chemical inspection of the tube bundle of atmospheric and vacuum gasoline water cooler. Circulating water flows inside the pipe (30-40 degrees Celsius), and gasoline flows outside the pipe (90-130 degrees Celsius). Since water and gasoline severely corrode carbon steel tube bundles, heat exchangers often leak and shut down. The picture above is a heat exchange tube (diameter 25 * 2.5mm) Metal surface corrosion condition after less than 1 year of use.
Dew point corrosion and acid corrosion: H2S=HS- + H+ ； HS- =S2- + H+ ； Reasonable addition of corrosion inhibitors can effectively alleviate corrosion.
We have anti-corrosion requirements in the process of equipment anti-corrosion management. Different corrosion inhibitors are added to the circulating water and the oil and gas side. This can prevent metal corrosion in liquids and plays a mainstream role. However, despite this management, some heat exchanger tube bundles still have serious corrosion, so appropriate anti-corrosion coatings can be used to protect the surface corrosion of the metal.
How to choose anti-corrosion coating?
For this type of pipe bundle corrosion, you can choose paint coating to prevent corrosion. There have been domestic literature reports for a long time. In addition, my column has published such introductions, so you can take a look.
Generally, the circulating water pressure inlet pressure is 0.6 MPa. Oil and gas is about 1 MPa.
Thank you, Mr. Wang, for your advice! Where are you? I am in Dezhou, Shandong. My phone number is 13053440022. Wang Meijun, thank you!
Thank you, Teacher Wang, for your advice! Where are you? I am in Dezhou, Shandong Province, Wang Meijun.