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Spiral plate heat exchanger in the anti-corrosion efforts
Jan 24, 2018

Conventional heat exchangers have a problem of being easily corroded in addition to being inefficient in handling heat exchange. Therefore, the spiral plate heat exchanger now being introduced has done a lot of work in this respect and has also ensured the integrity through various anti-corrosion technologies. So as to better expand the scope of its use.


The first is the use of electrochemical protection in spiral plate heat exchangers, which increases the useful life of spiral plate heat exchangers by sacrificial anode protection, but the protection of this technique is limited to the limited length at the inlet of the tube; Cathode protection is difficult to achieve deep in the tube, so the sacrificial anode protection method in the spiral plate heat exchanger has been greatly restricted.


Secondly, the choice of corrosion-resistant materials for spiral plate heat exchangers, such as binocular stainless steel, Hastelloy, titanium, titanium, copper, etc., these materials corrosion resistance, can improve the spiral plate heat exchanger life. Or the metal surface of the spiral plate heat exchanger, by a certain coating method covered with a layer of corrosion protection coating to prevent the metal surface and the corrosive media in direct contact.


In contrast, this anti-corrosion technology spiral plate heat exchanger more cost-effective, initially used to prevent corrosion of the gas medium, most of the coating used for the organic polymer mixture solution. People gradually to the oil and solvent resistant coatings, high temperature coatings, heavy duty coatings and special environmental coatings direction.


Another technique is to add a small amount of certain substances to corrosive media of spiral plate heat exchangers, which can greatly reduce or even stop the corrosion of metals. However, it should be noted that the addition of corrosion inhibitor should not affect the production process and product quality as the principle.

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