I would like to ask all the experts: what material is suitable for the high-purity hydrochloric acid tanks and pipelines used in electrolyzers? The requirement is that the calcium and magnesium content should be low. Thank you!
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I would like to ask the experts: what materials are suitable for the high-purity hydrochloric acid tanks and pipes used in electrolyzers, with low calcium and magnesium content required. Thank you!
I would like to ask the experts: what materials are suitable for the high-purity hydrochloric acid tanks and pipes used in electrolyzers, with low calcium and magnesium content required. Thank you! Previously, our pipes were made of PVC, and the tanks were made of low-calcium magnesium fiberglass. However, in recent years, the tanks have been corroded by hydrochloric acid, resulting in a high calcium and magnesium content! !
First, the reasons: 1. The gaskets used for pipe flanges contain calcium and magnesium. 2. During summer, due to high temperatures, calcium and magnesium are leached from fiberglass-reinforced plastic containers. 3. The calcium and magnesium levels in the pure water system were not properly controlled. Now, the measures: 1. Replace the gaskets with those that contain low levels of calcium and magnesium. 2. Refining fiberglass storage tanks by lining them with rubber. 3. Lab technicians should improve their skills: add acid before sampling, and ensure that the sampling containers are sealed.
The rubber lining should be low in calcium and magnesium, right?
For acid tanks, use fiberglass-reinforced plastic (pay attention to resin selection); for pipes, CPVC is recommended
Pipes and equipment made of fluoroplastic materials are corrosion-resistant and do not release metal ions
Use fiberglass reinforced plastic with low calcium and magnesium content for the equipment, CPVC for the pipes, and EPDM rubber for the gaskets.
CPVC is used for pipes; could its calcium and magnesium content be high?
No, CPVC has an extremely low content of calcium and magnesium
Steel lined with plastic is not suitable for such equipment, as it tends to deteriorate due to high temperatures; the use of iron is problematic, while fluorine-lined materials are too expensive. The new PPH material is excellent – it has been in use for several years now. For pipes, CPVC works well, lasting 10–15 years without issues; higher-quality steel frameworks can also be used. It never leaks or breaks for life.