Severe corrosion occurs in the stainless steel gasoline water-cooler tube bundles of petrochemical hydrogenation units
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The image below shows the gasoline water-cooler tube bundle of a petrochemical hydrogenation unit. Under operating conditions, circulating water flows inside the tubes at a temperature of 30 degrees and a pressure of 0.3 MPa, while outside the tube bundle, gasoline plus hydrogen is present at a temperature of 90 degrees and a pressure of 1.8 MPa. Within less than a year of use, severe pitting corrosion occurred on the gasoline side of the tube bundle. Analysis shows that chloride ions are present in this system along with an acidic pH value, resulting in severe pitting corrosion of the stainless steel. It is recommended that for such operating conditions, the use of a coating can be employed to solve this problem.
The teacher’s suggestion is excellent. Could you please advise on what type of coating to use and what precautions should be taken during application?
The pitting corrosion problem in the gasoline water cooler tubes may be caused by chloride ions and a slightly acidic pH level in the system. It is recommended to use a coating method under such operating conditions to prevent further corrosion. .
Under such conditions, a (corrosion-resistant and energy-saving titanium nano-coated heat exchanger tube bundle) can be used to solve this problem
Heat exchanger tubes coated with anti-corrosive and energy-saving titanium nanocoatings can be used to address the issue of pitting corrosion; such coatings are effective in preventing corrosion under the influence of chloride ions and acidic conditions. .