9-2
Reciprocal Shaking Water Baths
Thermo Scientific
Section 9
Maintenance
Caution
Never use the following chemicals.
-Aqua Regia
-Ferric Chloride
-Iodine
-Sodium Azide
-Sulfuric Acid
Removing Discoloration - Should the stainless steel ever become discolored by
iron rust, use the following procedure to remove all traces of the rust and
restore the stainless steel.
Warning
Observe the following safety precautions! Use heavy gloves or other
adequate protection. Only work in areas with adequate ventilation.
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Prepare a solution of 20% nitric and 1.5% hydrochloric acid (if preferred, a 2%
to 5% solution of warm oxalic acid may be used). Swab solution over surface,
allowing it to remain until all rust is loosened. This will usually take 1 to 2
minutes.
As soon as rust is loosened, immediately flush with clean distilled water until all
acid is removed.
Periodic Safety Check
Test operation of the Hi-Limit thermostat, as described in Section 7, every three
months.
