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How to prevent corrosion caused by the use of different metals in heat exchanger tube bundles?

2026-04-09View Original

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The image below shows the heat exchanger tube bundle of a wax production unit at a petrochemical company. The tubes are made of stainless steel, welding is carried out using stainless steel electrodes, and the tube sheets are made of carbon steel. After 3 years of use, corrosion occurred on the tube sheet of the heat exchanger. What methods can be used to avoid such corrosion?

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