The authoritative public forum
  for Metal Finishing since 1989
-----

Need testing procedures or kits

2001

I work in the lab at a small jobshop of about 75 employees. We are currently trying to reach the ability of performing all testing in-house. Could someone please help me find a titration, test kit, or other method for the following?

Sodium metasilicate ppm (in an emulsion bath {Brulin 815 GD}, 100 ppm min)

% by weight Iron (in a 50% HNO3 passivation bath, 2% max)

Metal oxide content (in a 50% HNO3 passivation bath, 5 g/L max)

Copper ppm(in an acid-chrome deox bath {Amchem #7/17}, 200 mg/L max)

Chloride oz/gal (in a 22 oz/gal Sulfuric anodize bath, .03 max)

Fluoride oz/gal (in a 22 oz/gal Sulfuric anodize bath, .02 max)

Chloride ppm (in a 22 oz/gal Sulfuric anodize bath, 200 max)

Thank you all for your help! Anything is appreciated.

Benjamin J. Curto
- Ponderay, Idaho, USA

---

Try the www.dstan.mod.uk and look at some of the standards for anodising as they have analysis methods at the back.

Also try to find your local laboratory supply company.

You could try a local school to see who they use.

Martin Trigg-Hogarth
surface treatment shop - Stroud, Glos, England
2001

---

There are two resources that I will direct you to. The first is a series of books on Analysis of Metal Finishing Solutions from ASM International. The books cover procedures and equipment for volumetric and colorimetric determinations. The second resource is Kocour Company. They have several different test kits specifically for metal finishing solutions. Good Luck. Ira Donovan, M.S.F. Kansas City, Missouri 2001 Since you are already buying some proprietary chemistry talk to the technical personnel at your supplier. They should be able to supply the procedures for the process line and recommend a source of chemistry. You might also want to purchase some reference books which are described elsewhere on this website to understand what you want to do and how to do it. Then you can purchase he necessary equipment and chemistry from supply houses such as Fisher Scientific, VWR Scientific, Arthur Thomas, etc. Also you might want to contact Kocour in Chicago, they manufacture test sets for a number of types of processes. Gene Packman process supplier - Great Neck, New York 2001