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-----Corrosion in SS304 tank used for potassium permanganate solution
2007
I am a process engineer working in a Fasteners industry. We are using potassium permanganate
⇦ on
eBay or
Amazon [affil link] and sodium hydroxide solution for descaling of fasteners. We are using SS 304 material for constructing the tank. I am noticing corrosion as taken place at the bottom of the tanks as tiny holes. This is happening only at the bottom and not the side walls. I am maintaining a temperature of 75 °C.
Can anyone give me suggestions for overcome the above issue.
Thanks in advance,
process engineer - Cochin, Kerala, India
How are you heating the tank?
James Watts- Navarre, Florida
2007
2007
Pit corrosion is characteristic of anodic side of a corrosion cell.
Try grounding the entire tank, and/or look for possible stray currents such as something attached to or contacting the tank that is connected to or close to a source of electric current. If found, insulate it from the tank. Or remove it. Lok for steel rake leaning on the tank, etc.
Don Baudrand
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics"
and "Plating ABS Plastics" eBay or AbeBooks affil links])
2007
I have had a Stainless tank containing an anodising dye perforated on the bottom.
The cause was attributed to dropped parts (probably brass) setting up a galvanic corrosion cell.
Geoff Smith
Hampshire, England
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