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Those rusty laser-cut chassis


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#1 swodem

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Posted 14 August 2017 - 07:03 PM

I'm on to a new process for cleaning and coating these chassis
I'm told it can be done after assembly and the finish will take solder well
So I found an old delinquent Mack Speed as a donor to test, before committing any new chassis to the same treatment

'Before'

207522d3fa3dc1435e5162ad3f424ced.jpg

Should have it back by the end of the week....


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#2 Phil Hackett

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Posted 14 August 2017 - 09:02 PM

There's a product that's often discussed in some of the YouTube machinist channels called "EvapoRust". Has anyone tried it? I seems to work without pitting the base metal (it's made for ferrous metals) and leaves a fairly decent finish.


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#3 Zippity

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Posted 14 August 2017 - 09:20 PM

Steve,

 

Can the chassis be cleaned that still have the ball bearings installed?


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#4 swodem

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Posted 15 August 2017 - 07:12 AM

Steve,
 
Can the chassis be cleaned that still have the ball bearings installed?


No, BB have to come out otherwise they too will get coated in nickel. The process doesn't discriminate any steel item....


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#5 John Streisguth

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Posted 15 August 2017 - 08:32 AM

There's a product that's often discussed in some of the YouTube machinist channels called "EvapoRust". Has anyone tried it? I seems to work without pitting the base metal (it's made for ferrous metals) and leaves a fairly decent finish.

My wife uses it on old sewing machines she restores.  Works well on steel and iron, but I don;t know how it may react to solder joints.


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#6 bluecars

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Posted 15 August 2017 - 08:48 AM

Is there a reason it cant be tumbled?


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#7 Zippity

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Posted 15 August 2017 - 04:09 PM

Sadly, tumbling doesn't polish steel like it does brass :(


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#8 Samiam

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Posted 15 August 2017 - 04:55 PM

On the tumbling thread there were stories of blackened and stained steel. Not sure if it was the water or the tumbling media.
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#9 bluecars

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Posted 15 August 2017 - 06:38 PM

Thanks guys, Question answered.


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#10 Pablo

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Posted 16 August 2017 - 01:28 PM

I tumble steel chassis and mine come out fine.


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#11 swodem

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Posted 17 August 2017 - 10:19 PM

After!!!

097ad18a8c4a03a36ca1e1233872a08f.jpg


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#12 Zippity

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Posted 17 August 2017 - 11:13 PM

Some transformation :good: :good:


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#13 swodem

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Posted 17 August 2017 - 11:24 PM

f81d723f77a9131ec1d024ea9e1553a2.jpg

67fdaf887f020010771bb5fd1bc2fc44.jpg


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#14 gc4895

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Posted 18 August 2017 - 07:57 AM

Like starting over!
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#15 kvanpelt

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Posted 18 August 2017 - 11:36 AM

Did you happen to weigh it before and after?


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#16 Phil Hackett

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Posted 18 August 2017 - 03:18 PM

Wow.... the axle bearings were dissolved! :laugh2:

 

Good stuff.


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#17 Mike K

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Posted 18 August 2017 - 05:32 PM

So......Still not clear.

What was the solvent/chemical that was used in the photos above?

Was it the "EvapoRust" mentioned above or a different chemical?


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#18 swodem

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Posted 18 August 2017 - 07:04 PM

No, it's a non-electro plating of nickel. Very thin, and very lubricious
Didn't weigh it sorry KvP, will do some more. Have a brand new Dubick to do so will weigh this before and after


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#19 swodem

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Posted 18 August 2017 - 11:11 PM

I tumble steel chassis and mine come out fine.

 

Wet or dry?


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#20 Zippity

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Posted 19 August 2017 - 04:17 AM

I tumble steel chassis and mine come out fine.

 

I'd love to see some photographic evidence in support of your claim :)


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#21 Samiam

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Posted 19 August 2017 - 08:11 AM

Steve,
Is this a NZ State Secret or can you tell us what this process is? I'd like to see if there are any platers doing this here.
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#22 Don Weaver

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Posted 19 August 2017 - 11:46 AM

I'd like to nickle plate some brass tube like we used to be able to buy in the 60's.  Made for really good looking chassis.  Would also be good for repairing some old Champion chassis too.


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#23 Phil Hackett

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Posted 19 August 2017 - 05:20 PM

Good ol' electroless nickel plating.... I did a lot of that in the 70s. Made up solutions, ran parts.. Computer drums and disk for memory... you probably have less than 40 millionths of an inch on the chassis.


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#24 Half Fast

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Posted 19 August 2017 - 05:47 PM

Electroless nickel plating see:

 

https://en.wikipedia..._nickel_plating


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#25 swodem

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Posted 22 August 2017 - 02:11 PM

So......Still not clear.
What was the solvent/chemical that was used in the photos above?
Was it the "EvapoRust" mentioned above or a different chemical?


No but see here, I have just tried that stuff...

http://slotblog.net/...79695-Evaporust


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