Mean Green Posted July 1, 2020 Share Posted July 1, 2020 What are people using to isolate different metals to reduce corrosion of dissimilar metals? My reading suggests PVC tape - does it need to be anything more than Electrical insulation tape or even gaffer tape?? Or should it be more specialist?? Quote Link to comment Share on other sites More sharing options...
western Posted July 1, 2020 Share Posted July 1, 2020 Anything will seperate the 2 materials plastic card as used by model builders for example. Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted July 1, 2020 Share Posted July 1, 2020 I've used PVC pond liner in the past. Can get a cheap offcut from a pond/aquatics store. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted July 1, 2020 Share Posted July 1, 2020 Electrical or gaffer tape just goes really manky / gooey over time, they're only designed for temporary use. What about sandwiching some pond liner / rubble sack sort of material in there - thick-ish plastic sheet. 1 Quote Link to comment Share on other sites More sharing options...
Tanuki Posted July 1, 2020 Share Posted July 1, 2020 Aston-Martin - in their 1950s "Superleggera" alloy-over-a-steel-spaceframe - historically used tallow-impregnated hessian. The 'modern' equivalent is a horribly-slimy thing called "Sylglas" tape, as used by roofers and aklso used to bind-over exposed welded joints on underground oil-pipelines. It's utterly-gross [wear gloves before even looking at it] but is really good at protecting dissimilar-metals joints. http://www.sylglas.com/products/wptape.htm Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted July 1, 2020 Share Posted July 1, 2020 Don't the aviation industry use Zinc Chromate paste / paint on dissimilar metals? Have a feeling they electroplate and/or prime everything with the stuff, it's the manky yellow or green colour you always see naked airframes in. Quote Link to comment Share on other sites More sharing options...
miketomcat Posted July 2, 2020 Share Posted July 2, 2020 Duralac or tefgel are another option used in the aviation and marine industry. Mike 1 Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 2, 2020 Share Posted July 2, 2020 8 minutes ago, miketomcat said: Duralac or tefgel are another option used in the aviation and marine industry. Mike Yeah I've used Duralac with some good results so far, a bit sticky to deal with but it appears pretty tough stuff. Quote Link to comment Share on other sites More sharing options...
Dr Strangeglove Posted July 15, 2020 Share Posted July 15, 2020 Has anyone used old milk containers. They look strong enough and flexible. Also you tend to have one available every couple of days and nice and easy to cut with scissors. Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 15, 2020 Share Posted July 15, 2020 2 hours ago, Dr Strangeglove said: Has anyone used old milk containers. They look strong enough and flexible. Also you tend to have one available every couple of days and nice and easy to cut with scissors. Close - I've used the clear plastic you get in some pizza box windows the found some clear projector type plastic slide stuff, thems difference, any type of thin tough and non biodegradable plastic should work well. Quote Link to comment Share on other sites More sharing options...
dailysleaze Posted July 15, 2020 Share Posted July 15, 2020 I've used duralac, and margarine tubs cut into gasket shapes 1 Quote Link to comment Share on other sites More sharing options...
Ed Poore Posted July 16, 2020 Share Posted July 16, 2020 Inner tubes? Old wellies ? Quote Link to comment Share on other sites More sharing options...
Jut Posted July 16, 2020 Share Posted July 16, 2020 used tiger bond to isolate the door skins and frame when i rebuilt the doors. Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 17, 2020 Share Posted July 17, 2020 17 hours ago, Ed Poore said: Inner tubes? Old wellies ? *Certainly inner tubes and if the wellies are rubber* - problem can be with rubber based products is they perish... quite quickly... tried that too. Quote Link to comment Share on other sites More sharing options...
Ed Poore Posted July 17, 2020 Share Posted July 17, 2020 3 minutes ago, Maverik said: Problem is with rubber based products they perish... quite quickly... tried that too. Well in that case wellies can't be made of rubber... I've had a piece of welly acting as a gasket on my aircon pump for about 6 years now in the engine bay and still like the first day. Dad's also had welly cut outs acting as o rings for his 2" pump and most of those are 15+ years old from when they were made. The wellies likely had a few years of use before that. Admittedly they might be too thick for some applications. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted July 17, 2020 Share Posted July 17, 2020 Damp proof membrane? The thick stuff for under bricks for point loads, tub tabs etc. The thin stuff for panels. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted July 17, 2020 Share Posted July 17, 2020 2 minutes ago, Ed Poore said: Well in that case wellies can't be made of rubber... I've had a piece of welly acting as a gasket on my aircon pump for about 6 years now in the engine bay and still like the first day. Dad's also had welly cut outs acting as o rings for his 2" pump and most of those are 15+ years old from when they were made. The wellies likely had a few years of use before that. Admittedly they might be too thick for some applications. Depends on the brand of wellies. Quote Link to comment Share on other sites More sharing options...
Ed Poore Posted July 17, 2020 Share Posted July 17, 2020 4 minutes ago, Gazzar said: Depends on the brand of wellies. Cheap - we live on a farm Quote Link to comment Share on other sites More sharing options...
Gazzar Posted July 17, 2020 Share Posted July 17, 2020 Ah! Less rubber, then. Quote Link to comment Share on other sites More sharing options...
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