For longevity a good protective primer is a must. It is there to for a
chemical barrier against corrosion, not phisical cover against water.
Gergo
2013/5/12 Larry Varley <varley@cosmos.net.au>
> 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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