Savings burner tube corrosion protection
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Below 600 degrees, a economizer tube bank is installed, and the flue gas contains corrosive gases such as phosphoric acid, hydrochloric acid, hydrofluoric acid, and sulfuric acid. How should the surface of carbon steel pipes be treated to prevent corrosion? Would it work to use phosphating treatment on the metal surface? I would be very grateful if any fellow sea traveler could offer some suggestions!
HaiChuan has several posts; you might want to take a look at them: http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=991973 http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=991974
Thank you so much! :Victory: But the operating conditions mentioned are quite different from those I proposed. In any case, I am still grateful for Haiyou’s selfless help and concern. Thank you!
Those components of yours are gases, right? They should be a mixture of phosphorus pentoxide, hydrogen chloride, hydrogen fluoride, and sulfur trioxide. Nickel-based alloys such as Alloy 625 and Alloy 59, as well as Hastelloy X and Hastelloy F, can be used
Thank you for the reminder; Hastelloy should be suitable for use. Thank you so much!
This post was last edited by Haitian LSHW on 2012-8-24 at 19:03. For boiler flue gas and blast furnace flue gas, there are systems for controlling the flue gas temperature, which is essentially about controlling the dew point; a higher flue gas temperature can also be achieved by using ND steel, a material that seems to be 09CrCuSb. This material is described in the appendix of GB150 – the old version; I haven’t seen the new version yet. Epoxy coating is another option as well. I hope this helps you.
The smoke exhaust temperature has now been raised to 260 degrees; going any higher is pointless. But problems still arise with ND steel. Headache! Thank you for HAIYOU’s concern and support. Thank you so much!