[Healeys] Powder on Springs

[Larry Varley]

I agree with Kees here, in any form of coating surface preparation is 
critical, and I have seen far too many cases of rust under powder 
coating. It looks good but how well is it stuck. I would also be wary of 
any coating that involved heat and springs. If you take a look at any 
good industrial paint spec for steel, it will be sand blast, to provide 
a semi rough surface for mechanical adhesion of the primer, then top 
coat. In fact as long as the surface is sand blasted even the primer 
step can be optional.
Cheers
Larry

On 12/05/2013 6:25 PM, Oudesluys wrote:
> These relatively low temperatures for curing the powder coat can have 
> significant effect on steel springs, especially springs made from BS 
> 2056 En 58A/56 steel, stainless steel (n.a. in this case) and low 
> alloy carbon steel are prone to this
> The problem with powder coating is that the adhesion to the metal is 
> not always as it should and (serious) corrosion can creep under the 
> coating without you seeing it until it flakes of. Although it looks 
> nice and shiny when all is OK, it just looks to perfect as it also 
> evens out many original small imperfections.
> I prefer the old fashioned way of primer and chassis black with the 
> imperfections in the metal visible. It is also easier to de-rust and 
> touch up.
> Kees Oudesluijs
> NL
>
> Op 12-5-2013 3:36, Charlie Frazer schreef:
>> I was a little surprised to read the suggestion in a recent post that 
>> powder
>> coating on front springs caused the springs to sag.
>> Is it true that a temp as low as 400 degrees could take the temper 
>> out of
>> spring steel?
>> More specifically, do listers recommend against powder coating 
>> suspension
>> parts such as springs and A-arms?
>> Thanks,
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