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Control Panel in an Acidic Environment

We are looking at installing a 316L Control panel within an environment where Sulfuric Acid is handled extensively.


Where can I look to understand what special requirements are needed for this environment?

I understand that Hydrogen Sulphide turns Copper into Copper Sulphate - which has a significantly lower conductivity level;

To mitigate/slow down that reaction, tinning exposed copper is usually practiced - but I don't know what is required for Tri-rated cabling and components such as Contactors etc.


The control panel is only going to be open for maintenance purposes, so the internals aren't going to be subjected to much vapour, and any spills would be on the outside of the panel.

I have a feeling that as the components are protected by the panel, to IP54 minimum, that the corrosion would be at a slow enough rate to reasonably not have to worry about it when thinking about the life expectancy of the panel - but any advise and references would be appreciated.


Thanks
Parents
  • Make the unit as airtight as possible. Consider remotely siting contactors and power circuits in a clean area, such that the control panel only contains ELV relays, pilot lamps, and switches.

    Select sealed components as far as possible.


    In extreme cases consider very slightly pressurising the control panel with clean compressed air obtained from an existing air system.
Reply
  • Make the unit as airtight as possible. Consider remotely siting contactors and power circuits in a clean area, such that the control panel only contains ELV relays, pilot lamps, and switches.

    Select sealed components as far as possible.


    In extreme cases consider very slightly pressurising the control panel with clean compressed air obtained from an existing air system.
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