博文

目前显示的是标签为“HVAC”的博文

Electrochemical Antiseptic Maintenance of Plate Heat Exchanger

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Hofmann Plate Heat Exchanger How does plate heat exchanger in the application maintain anti-corrosion? After knowing the reasons for a variety of corrosion of the heat exchanger, it is necessary to choose reasonable anti-corrosion measures in order to achieve the purpose of efficient use of equipment. To the corrosion of the situation, there is an anti-corrosion method. Here mainly introduced corrosion inhibitor, electrochemical protection. 1. Corrosion inhibitor Corrosion inhibitors with chromate as the main ingredient are commonly used in cooling systems. Chromic acid is an anodic (process) inhibitor, which, when combined with a suitable cathodic inhibitor, has satisfactory and economical anti-corrosion effect. Chromate – Zinc - Polyphosphate: Polyphosphates is used because it has the effect of cleaning metal, has the ability to inhibit corrosion. They can be partially converted to orthophosphate; can also produce large colloidal cations with calcium to inhibit ...

What kind of materials does plate heat exchangers’ framework usually adopt?

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Plate heatexchanger framework is composed of fixed and moveable plates (including baffle, the intermediate plate), upper and lower guiding bars, columns, tightening bolts, anchors, etc.   一、 PlatesMaterials material grades standard type Q235A GB/T700 carbon steel Q235B Q235C 16MnR GB/T713 pressure vessel steel Q235A GB/T1591 0Cr18Ni9 GB/T4257 stainless steel 00Cr19Ni10 Note: fixed and moveable plates (including baffle, the intermediate plate) can be coated by 0Cr18Ni9, 0Cr17Ni12M02. 二 . Bolts Materials material grades standard type Q235A GB/T700 carbon steel 35 GB/T699 quality carbon steel 45 40Cr GB/T3077 alloy steel 35CrMoA 35CrMo 2Cr17 ...