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« Stainless Steel without colored oxide | Main
Monday
Jan112010

Stainless Steel with colored scale

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Recommended Process Line for ChemPolish™ for 300 Series SS with Colored Scale

Step
Process Line
Concentration & Temperature
Time
Heater Equipment
Process Equipment
Exhaust Required
1.
25% by volume 130°-180°F (45°-80°C)
5-10
Minutes
SS or Quartz - OK
Teflon - OK
Titanium - OK
SS - OK
PVC - OK at lower temps
PP - OK
No
2.
Cold Rinses, cascaded. Tap Water OK Can usually be sent to drain with only pH adjustment, if needed
3.
50% by volume Part A + Part B 180°-200° F (80°-90° C)
60-90 Minutes
Teflon - No
Titanium - OK
Quartz - OK
PVC - No
SS - OK
PP - OK
Yes
180° F Max
w/reinforcement
4.
Cold Rinses, cascaded Tap Water OK, Can usually be sent to drain with only pH adjustment, if needed
5.
100% by volume 70°- 90°F (20°-30°C)
30-60 Seconds
Teflon - OK
Titanium - No
Quartz - OK
PVC – OK
PE - OK
PP – OK
Yes
6.
Cold Rinses, Cascaded. Tap water OK
(May need to be treated for Nickel and Chromium removal & pH adjustment).
7.
100% by volume 175°-185° F (78°-82° C)
3-8
Minutes
Titanium - ??
Quartz - OK
CPVC - OK
PP - OK
PVDF - OK
Yes
8.
Cold Rinses, cascaded. Deionized Water for best results.
(Will need to be treated for Nickel and Chromium removal & pH adjustment)
9.
Nitric Acid Desmut (Needed only when SS has significant Carbon Content)
50% by Volume Commercial 42° Be’ Nitric Acid Unheated
30-60 Seconds
DNA
PE - OK
PP - OK
PVC - OK
SS - OK
No
10.
Cold Rinses, cascaded Deionized Water for best results
(Can usually be sent to drain with only pH adjust)