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Recommended Cleaning Procedure
Stainless steel needs to be cleaned regularly to maintain the corrosion resistance as well
as to maintain the overall aesthetics of the stainless steel.
It is fairly simple to clean most contaminants off the surface of stainless steel. Most dirt
and soil can be cleaned with a clean cloth, warm water, and mild detergent. For persistent
dirt, a little vinegar can be added in the cleaning water. It is important to always rinse
the surface with warm water and wipe with a dry cloth after any cleaning, whether mild or
aggressive.
• Fingerprints, mild stains or grease spots can be cleaned using organic solvents such
as acetone, methyl or ethyl alcohol, or mineral spirits. Stainless steel wipes or glass
cleaners commonly available in stores may also be used.
• Occasionally the surface of stainless steel can get chips or shavings embedded in it
from having metal machined or welded in the vicinity. The iron chips can start to rust,
reducing the corrosion resistance of the stainless steel, and stain the surface giving
the impression that the stainless steel is rusting. These types of contaminants require
more aggressive cleaning. Mild abrasives such as Scotch-Brite™ products may be
used where aesthetic considerations are not important followed by solvent cleaning
with organic solvents as described above. It is important to rinse the surface with
warm water and wipe with a dry cloth after cleaning.
• If the metal chips are not removed with the Scotch-Brite™ Products, electro-chemical
cleaning may be required. BAC uses commercially available equipment for electro-
chemical cleaning in the field. Contact your local BAC Representative for more
information.
System Cleaning
Closed Loop System Cleaning
With proper precautions, prior to start-up circulate an alkaline solution which can be
used to clean condenser water systems through the Nexus
®
Modular Hybrid Cooler. The
necessary precautions include:
• Be sure a strainer is in place ahead of the hCore
®
Heat Transfer Technology to avoid
clogging of the passageways in this section with weld slag, debris, etc. Note that after
start-up, a smaller mesh strainer can be substituted for the start-up strainer.
• Limit the duration of the cleaning to one day or at the most two days with a maximum
opening of 1/16”.
• The temperature of the solution should never exceed 100ºF (37.8°C).
• The maximum concentration of chemicals in the circulation solution should not
exceed any of the following:
– 5% Sodium Hydroxide
– 5% Sodium Metasilicate
– 2% Sodium Carbonate
– 2% Tetra Sodium Pyrophosphate
– 0.5% Trisodium Phosphate
– 0.5% Sodium Nitrate
– 5-10% Butyl Cellosolve