Chemical compatibility of hydrocloride acid 1

[bmw318be]

Understand ss316 or any metals is not suitable to handle acid,

Please advise any suitable pump materials that could resist this hydrochloride acid

Other chemical would be sulfuric acid

 

[micalbrch]

Polypropylene (at lower concentrations), PVDF, PTFE.

 

[cloa]

Otherwise you have choice of zirconium only if its free of oxidising ions such as cupric/ ferric and titanium only if contains such oxidising ions. Superduplex can handle low concentrations like 6%.

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[EdStainless]

There are entire books on this subject.
The concentration, temperature, impurities, and mechanical stresses must all be taken into account.
Design for acid service is not for amateurs.

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Plymouth Tube

 

[bmw318be]

Is alloy 20 could handle acidic such as hydrochloride, design tperature is 80 degree C where operating temp is ambience, the specific gravity is 1.2

Endstainless:

Impurities,mechanical stress, temp, concentration does it directly proportional to corrosiveness of the casing material ?

 

[moltenmetal]

Forget about alloy 20 with hot hydrochloric acid.

Concentrated HCl acid at 80 C is best handled in Teflon-lined equipment. If you must use metals, your choices are Hastelloy B, zirconium or tantalum. Both HB and zirc are only resistant if there are no oxidizing ions like Fe+3 present. There are no other choices I'm aware of.

Be aware also that the velocities in pumps are high, so erosion-corrosion can be an issue. You're far safer with the lined construction.