Stainless Steel without colored oxide
January 11, 2010
RD Chemical Company in Other Process Chemicals, processes
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Process Line for ChemPolish™ of 300 Series Stainless Steel without colored oxide

Step
Process Line
Concentration & Temperature
Time
Heater Equipment
Process Equipment
Exhaust Required
1.
Alkaline Clean: Spray MicroClean™ CuL
(RD-19)
25% by volume
120-170°F (50-75°C)
2-4 Min.
SS or Quartz - OK
Teflon - OK
Titanium - OK
SS - OK
PVC - OK
PP - OK
Yes
OR
1A.
Alkaline Clean Soak tank MicroClean CuLX™
(RD-68)
25% by volume
120-170°F (50-75°C)
See above
No
2.
 Cold Rinses, cascaded can usuallly be sent to drain with only pH adjustment, if needed
3.
100%
175°-180° F (80-85° C)
60-90 Seconds
Teflon or Quartz – OK
Titanium - OK
PVC - No
PP - OK
Yes
OR
3A.
100%
175°-1800° F (80°-850° C)
60-120 Seconds
Teflon or Quartz - OK
Titanium - OK
PVC – No
Yes
4.
 Cold Rinses, Cascaded, (May need to be treated for pH adjustment, and Nickel removal)
5.
 (Treatment with 50% commercial 42° Be’ Nitric acid may be required if SS is high carbon, and a black smut is generated. This is room temp, ~30 seconds)
6.
 Further cold rinse, if required.
7.
 Dry, Turbine blower preferred, if material can handle force.
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