Equivilent Material For Tinning Salt PC608 Batch NO. 76

Some 50 years ago, we used a red sticky paste compound made by BICC Ltd, of Erith, Kent, UK, and intended for electrical soldering, but was also suitable for soldering mechanical joints.

It arrived either in small flattish "shoe polish" type tins, or larger containers as required.

With this we could solder to steel, stainless steel etc.

It was non-corrosive, non-poisonous, but did require some solvent cleaning to remove the surplus after the soldering operation was completed.

You don't say what type of materials you are soldering, or electrical or mechanical joints etc.

Have a look here - they may be able to assist you...

http://www.interfluxusa.com/Technical/technical-info1.html

The biggest problem with any flux is that it does leave a corrosive residue after the heat has done it's job.

This is why you need to clean the board after using any flux

Recently there has been a lot of advances made due to stringent legislations and now you have rosin fluxes that are less or almost not corrosive. Try http://www.action-electronics.com/kester.htm

You will most defenitely find something there that will do your job.

Good luck

corrosion takes place at room temperature in most electronic curcuits if a corrosive flux is used. Rosin is a high melting organic with some acid grioups.

At solder temperature it acts as a flux, at room temp is it non ionic solid = no corrosion.

Stainless needs 'killed acid', this is muriatic with added zinc to consume free acid.

This is essentially ZnCl and it is a very good flux, but it is also very corrosive and must be washed off as it is hygroscopic and draws water from moist air