 | Home > Maintenance & Modifications > Galvanised Replacement Doors |
 
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6312   
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can I enquire as to why you won't be spraying them?
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23rd Jan 2022 2:14pm |
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| Mossberg Member Since: 29 Feb 2020 Location: Lancs Posts: 553  
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I agree with this. As a sheet metal worker in a previous life, I can assure you zintec gives very limited protection. Treat it as if its mild steel. If anything has been spotwelded that is an area that is likely to be subject to corrosion. Remember any galv/zinc would be burnt off when when the weld takes place. The real area to consider is between the two pieces where the spotwelded is. If these areas are where water or moisture will sit it will be a real contender for corrosion. You need a good penetrative rust inhibitor here.
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23rd Jan 2022 2:26pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2254 
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@ghound - Robert, any plans for Front doors to match my galv rear door ?
Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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23rd Jan 2022 2:50pm |
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| Ghound Member Since: 03 Jul 2018 Location: northern ireland Posts: 45 
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Hi, yes I'm serious considering making them, but they wouldn't be exact copies, I'd like to make them a bit tougher.
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23rd Jan 2022 2:53pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2254
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Sounds good, I'll wait with baited breath 👍
Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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23rd Jan 2022 4:34pm |
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| Mossberg Member Since: 29 Feb 2020 Location: Lancs Posts: 553
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Looking forward to seeing this. Good luck with it. |
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23rd Jan 2022 4:47pm |
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| Intercept Member Since: 27 Feb 2017 Location: Suffolk Posts: 587 
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I thought that my doors from SP were skinned with Zintec, but the description below states that their steel skins are electroplated:
https://www.sp-4x4.com/category_s/437.htm |
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23rd Jan 2022 6:50pm |
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| Mossberg Member Since: 29 Feb 2020 Location: Lancs Posts: 553
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Just for your information. I picked this from the Web;-
Zintec is created by using the process of electrolysis to coat the mild steel with a thin layer of zinc, typically between 1.0 and 1.75 microns thick, a more precise method of zinc coating than other methods such as hot dipping. The finished Zintec metal can be produced at varying thicknesses between 0.4 and 2.0mm, with a matt grey finish that is notably different to untreated mild steel. It is important to note that Zintec is designed to protect the mild steel during transport, storage, manufacturing and production processes; it is not suitable for use in corrosive environments without a paint coating or other protective application |
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23rd Jan 2022 8:08pm |
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| Ghound Member Since: 03 Jul 2018 Location: northern ireland Posts: 45
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I make all the components including the skins
anyways as i restore original doors, so it shouldn't be a big leap to make my own version.  Click image to enlarge
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23rd Jan 2022 10:01pm |
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| Mossberg Member Since: 29 Feb 2020 Location: Lancs Posts: 553
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That's interesting. Have you considered doing a stainless steel version?
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24th Jan 2022 2:17am |
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| bodstruck Member Since: 09 May 2020 Location: Wiltshire Posts: 933
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Facilities and cost really. I had a Clarke temporary garage while I painted the td5 but that has gone now so I don't really have anywhere suitable for spraying. I do have a concern about getting in to the nooks and crannies inside the door so the priming may be a mix of rattle can and brush. For the topcoat I will be going for a satin finish and I have found brush and roller to be perfectly adequate for my needs, loads cheaper (as I can do it myself) and easy to patch or re-do in the event of scratches or damage. |
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24th Jan 2022 1:52pm |
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| Ghound Member Since: 03 Jul 2018 Location: northern ireland Posts: 45
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Stainless is a lot harder on the machinery to work with, it wouldn't be something I'd consider doing.
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25th Jan 2022 10:11am |
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| Mossberg Member Since: 29 Feb 2020 Location: Lancs Posts: 553
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I fully understand but it's a shame as what a bonus that would be - though they would probably be out of my price range!
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25th Jan 2022 11:56am |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3437  
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Some people go to great lengths to isolate steel fasteners to minimize galvanic corrosion. Stainless steel is a bit further away than aluminum on the galvanic table so the galvanic reaction is larger due to greater potential. Having huge stainless steel panels fitted to each side of a defender is asking for trouble.
Galvanized (not zintec) sheet metal is the best material. Most manufacturers give life times in excess of 30 years (bare galvanized) in relatively corrosive environments, like gutters etc. The reason that galvanizes steel has such a good life is the huge surface are of the zinc compared to the exposed area of the steel. Maybe galvanized doors may protect your chassis (although I doubt)  1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black |
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25th Jan 2022 6:13pm |
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