A modded Cossor 54

[boater sam]

I use phosphoric acid as a brush on or a dip. It leaves an attractive black finish on very rusty steel. Its cheap to in 5 litre bottles.

[Mike Watterson]

Probably a mix of Phosphoric acid and alcohol, That's what's in the Rustin's brand in my local coop.
The black is Iron Phosphate..

[Murphyv310]

Absolutely superb job Frank.
It's certainly going to be a cracking set once completed.

[ppppenguin]

This is going to be a really lovely set. A great example of your hard work and dedication.

[`FRANK.C]

Thanks Trevor and Jeffrey
For the most part so far I haven't been doing much but pulling it apart. When I look around the shed here with bits of it scattered all over the place it don't look much like progress more like anti-progress.

In an earlier post I said that I wasn't keen on painting it. But I came across this that I haven't heard of before.
https://www.zinga.ie/
I think it maybe worth considering. It is conductive. How conductive I don't know yet but I have ordered a small amount some to try it out.

Label of rust remover photo below.

Frank

[Mike Watterson]

The Zinga sounds interesting. Maybe do to RF screen inside plastic cabinets to as neater than aluminium foil and cheaper than nickel spray.

Don't drink the rust remover!

Let me know if you are ever visiting Limerick and I might have some vintage stuff for you.

[boater sam]

Zinga is being used on boat hulls' under water areas, the results are so far good. Conductivity may be good as it is designed to be a sacrificial anode.

[`FRANK.C]

Hi Mike
If I am down Limerick way I will let you know. Likewise If you are ever around Roscommon do drop in. I would love to have a chat.

I have been doing a bit of searching online and this type of paint can be got under a few different brands. The zinc content varies a lot depending on the brand.

Frank

[`FRANK.C]

The Zinga arrived but it is not very conductive. I put some packing tape on a board and taped two pieces of tinned copper wire spaced 5cm apart on top of the tape. I painted a 2 cm wide strip of Zinga connecting the two wires.
   
After the Zinga dried there is infinite resistance between the two wires. placing an insulator on top of the wires and applying pressure the resistance can drop as low as 6M. The resistance varies with the pressure applied.
Piercing the Zinga with the meter probes I can get resistances from 40M (which is as high as the meter will read) down to the 100's of kilo ohms.

When the Zinga was wet it was conductive. I measured around 37M when first applied and it dropped to around 4M as it cured. I left it over night and the follow morning it was open circuit.

I found a platers and have got the chassis back from them. I asked them to keep it as mat as possible but it still was quite bright.
       
I dunked it into some dilute vinegar for a couple of hours. That has toned it down a bit and should look a bit better in an old telly that the really shiny version.
       
Frank

[Mike Watterson]

The Zinga arrived but it is not very conductive. I put some packing tape on a board and taped two pieces of tinned copper wire spaced 5cm apart on top of the tape. I painted a 2 cm wide strip of Zinga connecting the two wires.

After the Zinga dried there is infinite resistance between the two wires. placing an insulator on top of the wires and applying pressure the resistance can drop as low as 6M. The resistance varies with the pressure applied.
Piercing the Zinga with the meter probes I can get resistances from 40M (which is as high as the meter will read) down to the 100's of kilo ohms.

well, that's a pity!

The vinegar is a good idea, though the zinc will dull eventually.