Can fiberglass withstand acids and alkalis?
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 23:18. How resistant is fiberglass to acids and alkalis? Are there any pH range restrictions? Can the acid solution obtained after washing chlorine with water be circulated using fiberglass-reinforced plastic? # ， ， &
Yes, there are many types of fiberglass – some are resistant to acids, others to alkalis, and their temperature resistance also varies. For detailed information, please consult the manufacturers of fiberglass equipment. Such as Knet, Zhongyi, Lianzhong.
Glass fiber reinforced plastic can indeed be used in acidic environments. Our waste sulfuric acid storage tanks are made of glass fiber reinforced plastic; the acid concentration in them is around 70-85%. There are various types of glass fiber reinforced plastic available, and the 470 resin produced by Dow Chemical is an excellent choice. Our chlorine gas pipelines are also made of glass fiber reinforced plastic, using 470 resin, and after 4 years of use they are still in excellent condition
Thank you all. I’m considering whether our company’s fiberglass pumps can be used for waste acid, and specifically for washing chlorine with water. . . I’ll give you scores tomorrow. . I hope everyone will actively share their opinions. .
There are different types, capable of withstanding both acids and alkalis
Resin 470 performs well in terms of resistance to moist chlorine gas, but it is not effective against concentrated sulfuric acid at concentrations of over 75%; solutions with a concentration of 75% or more are highly oxidative media. I don’t think it’s possible to use this resin for four years – could other materials be used instead?
It is recommended that you not use used fiberglass-reinforced plastic pumps to handle waste acid; fluoropolymer-lined pumps are a better choice
It is recommended to use fluoroplastic alloy pumps lined with PTFE or magnetic pumps lined with PTFE.
Dow’s 470 is considered quite good among phenolic epoxy vinyl resins, though it is also expensive. I’m not sure if you’ve heard of Shanghai Fuchen’s 791H chlorinated unsaturated resin, which exhibits excellent resistance to high temperatures, humidity, and chlorine gas.
You’re already in fourth grade! Still asking this question?
Please do not mislead people – glass fiber pipes cannot be used in chlorine pipelines that contain concentrated sulfuric acid. Remember this! ! :victory: