Revision History

Revision A: Dated – October 29, 2008

  Add approval signatures and dates.

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1.0 SCOPE

1.1  This document establishes a standard procedure for  

handling components which are electro polished and  

  packaged for Class 100 standards.

1.2  The material is assumed to be a type 316L stainless steel

but other austenitic stainless steel shall be handled in the

same manner.

2.0 PROCESS MATERIAL

2.1 ELECTROPOLISHING FLUID

  2.1.1 The electrolyte used for electro polishing components

    a commercial grade fluid which is closely monitored

    required by the supplier to assure a consistent

polished surface.

2.2  D. I. WATER

  2.2.1 Resisitivity – 8-10 Meg Ohm

  2.2.2 Filtration – .2 micron

2.3  NITROGEN

  2.3.1 SOURCE – BOTTLED

2.3.2 PURITY – 99.998%

2.4  CLEAN WIPES – Commercial Lint Free

3.0  RECEIVING AND INSPECTION

3.1  Inspect incoming components flaws and determine if  

  manufacture initiated or caused by shipping.

  3.1.1 Notify customer of rejected parts.

3.2  Initiate work order with description of component, part

  number, quantity, E.P. requirement, inspection  

  information, and other pertinent information.

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3.3  Clean component to remove surface contaminants.

3.4  If heat scale or discoloration is evident, pickle the  

  component in a nitric acid bath until the scale is dissolved.

4.0 ELECTROPOLISHING

4.1  The component is racked and electropolished to obtain the

  required final finish.

4.2 Rinsing Procedure

  4.2.1 Drag out in potable water.

  4.2.2 Pig rinse in nitric acid solution.

  4.2.3 Second rinse in potable water.

  4.2.4 Third rinse in potable water.

  4.2.5 Component is removed from rack.

  4.2.6 Final rinse in D.I. Water.

  4.2.7 Place component in Class 100 clean station for cool

down and drying.

5.0 PACKAGING

5.1 Standard Packaging

  5.1.1 Component is placed in a poly bag and heat sealed

to protect it from handlin

 

g

contamination.  

  5.1.2 Component is placed in a suitable shipping container,

    cushioned by packing material and sealed for  

shipping.

5.2  CLASS 100 PACKAGING

5.2.1 Component is retained under a Class 100 clean

station laminar flow hood.

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5.2.2 Component is rinsed in a cold D.I. Water bath.

5.2.3 Component is rinsed in a second bath of hot

    (150 dg. F)  D.I. Water rinse.

  5.2.4 Component is blown dry with Nitrogen Gas, filtered

    to .02 micron at room temperature.

  5.2.5 If excess D.I. Water is present, a lint free wipe shall

    be used to absorb moisture.

  5.2.6 The component is placed in a 2 mil poly bag, purged

    with Nitrogen Gas and heat sealed.

  5.2.7 The bagged component is placed in an outer 6 mil

    poly bag and heat sealed.

  5.2.8 A label is attached to the bag denoting the part

    number and Class 100 package information.

  5.2.9 Component is placed in a suitable shipping container,

    cushioned by packing material and sealed for  

shipping.

6.0 SHIPPING

6.1  All orders are shipped by the most effective means and/or

customer instructions.

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