Dear Haseeb,
While checking the DFT from where do the counting starts when we are using DFT gauge?? from the base metal or from the profile?? can you please explain on that?? Upto my knowledge it will be from the peak height.Please clarify.
regards,
Arun S Das
From: haseeb ph <haseebph@gmail.com>
To: materials-welding@googlegroups.com
Sent: Thu, 28 October, 2010 1:21:17 AM
Subject: Re: [MW:7883] Surface preparation and coating
to control the dft first you have to know the paint type, if it is a high build or not and most safe is first paint on the test panel and from that you can calculate no. of passes required to get the correct dft
-- Haseeb
KSA
On Wed, Oct 27, 2010 at 10:33 AM, Sundaram Sundaram <nss2410@gmail.com> wrote:
Thanku for your reply Mr.Gole.The primer DFT- 75microns,midcoat coat- 75 microns,final coat- 75 microns.overall 225 microns.Most of the times the total DFT is exceeding 225microns and how to control this.Can you give some more clear picture,pls
On Wed, Oct 27, 2010 at 11:15 AM, BHARAT GOLE <bharatgole@hotmail.com> wrote:
If surface profile is more than acceptable limit then it may cause for rust rashing i.e high peaks may expose after paint curing/contraction will be rusted.
Actaully it depend upon the so many factors such as whole paint syetem and DFT etc
Bharat B. Gole
> Date: Tue, 26 Oct 2010 22:58:41 -0700
> Subject: [MW:7857] Surface preparation and coating
> From: nss2410@gmail.com
> To: materials-welding@googlegroups.com
>
> Dear friends,
> Blasting Grade required - SA2.5
> Surface profile required - 40 - 70microns
>
> If the surface profile crossing the required limit 70-
> 80microns then what will the effect on painting and what is the
> reference code.Please guideme
>
> --
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