date:Aug 06, 2012
At these lower temperatures, corrosion is likely to be much less than at 82oC.
This programme is popular in the US where most of the plants (200) that were previously using phosphoric/nitric acid based products from Ecolab are now using this programme to save energy. Plants clean at 40o-50oC, lowering energy (steam) demands by 40-60% of the original hot acid cleaning programme (70-80o C). It has just been introduced into this region.
Fig 4. Corrosion of stainless steel with nitric acid and Env