Letter 13098

Stannate Process 

What is a stannate process? I think it is also know as a 10 step process involving Tin and Cyanide. Who in the U.S. uses this process?

Thanks,

Brandon Hellenbrand
- Fairburn, GA, USA

The chemical symbol for tin is Sn. Practically, 'stannate' just means alkaline tin plating as opposed to acid tin plating (stannous sulfate). There might be cyanide somewhere in the overall plating cycle or there might not be.

Ted Mooney, P.E.  finishing.com Brick, NJ

The stannate process is not going to make your aluminum adhesion problems go away.

Todd Osmolski Charlotte Plating, Inc. Charlotte, NC USA

Let's read about the stannate process:

The Immersion Deposition Process, D.S. Lashmore, Aluminum Finishing Seminar,Vol II, St. Louis, MO, 30 Mar - 1 April, 1982, Aluminum Association, Washington, DC. and Pretreatment for Plating on Aluminum Using The Stannate Process, Jongkind and Seyb, ibid.

Related stuff for tin plating:
Control of Anodes in Alkaline Tin Plating, M&T Chemicals, Rahway, NJ, Technical Data.

Anode maintenance in the Alkaline Stannate Tin Plating Bath,
Lowenheim, Metal & Thermit Corp. New York, NY., reprinted from March 1951 issue of Metal Finishing.

Technical Bulletin, M&T Chemicals, Rahway, NJ, Alkaline Tin Plating with M&T Stannates

Tom Pullizzi Platronica.com Falls Township, PA

Does anyone have a process for speeding up the potassium stannate process using Tin and Potassium Hydroxide?

Mark McCaughey
Metals & Additives - Indianapolis, In, USA

Hi, Mark. It wasn't clear to me whether the earlier inquiries were about a stannate process as an alternative to zincate for preparing aluminum for electroplating, or whether they were about alkaline tin electroplating -- and it's still not clear :-)

Ted Mooney, P.E. 
finishing.com
Brick, NJ

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