Letter 35004

Need procedure to test for total chlorides and sulfates

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I have a requirement to test my alodine 600 solution for total chlorides and sulfates monthly. I need a procedure/instructions on how to do this and what equipment I will need.

James S [name deleted for privacy]
aerospace - Lewisville, Texas

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Without knowing how good your lab is, I'm going to recommend ISE (ion specific electrode) since chlorides and sulfates would be contaminants in Alodine 600, and as far as equipment is concerned get specific recommendations from your favorite lab supply house for electrodes, meters, etc.

There are other ways to measure for these contaminants (titrate for chloride, gravimetric for sulfate), but I don't know what concentrations you're looking for.

James Totter, CEF
- Tallahassee, Florida

++++++ -- appended to this thread by editor

Dear all
We like to test our Alocrom 1200 solution that we use for aluminium treatment by titration method. I'll be grateful if you could let me know how do you carry out the titration test.

best wishes,

Sam Noori
- Bristol, UK

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