John, not sure if this is correct information, I went to purchase some SS screws to secure a sail track and was advised not to use them on aluminium as the two metals react (galvanic reaction) to each other. A friend of ours is a welder on the gas line in NT and he said that was correct. I am sure a boatie will be able to set me straight, look forward to reading other comments. Maybe the plastic in between will prevent the reaction. Darmc
-- Edited by Darmc on Friday 6th of October 2017 04:17:24 AM
Thanks for that tip mate, like most people I didn't knew that
So far I only screwed the stainless screws into the plastic parts
Hope this will help to explain with what I did
John, not sure if this is correct information, I went to purchase some SS screws to secure a sail track and was advised not to use them on aluminium as the two metals react (galvanic reaction) to each other. A friend of ours is a welder on the gas line in NT and he said that was correct. I am sure a boatie will be able to set me straight, look forward to reading other comments. Maybe the plastic in between will prevent the reaction. Darmc
-- Edited by Darmc on Friday 6th of October 2017 04:17:24 AM
Hi Darmc,
Does that mean that the brackets screwed to to top edge of the van for the anti flap kits are the same, as they are stainless steel
Not being a smart mate just asking.
-- Edited by Dougwe on Friday 6th of October 2017 08:06:37 AM
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Dougwe, I am only going on what I have been told by NQ Fasteners, when they asked what I was doing, they advised me against SS screws. At the time I was replacing some rusty screws this time around the front boot on a van, so I took their advice, they probably would have made a bigger sale if they sold me SS. Hence, why I made the comment about waiting for other replays. On some web sites it was recommended to use Tef-Gel or sikaflex on the screw. They told me it could cause electrolysis in the aluminium, so I took their word. Maybe they are wrong. See articles on Galvanic corrosion.
Darmc
-- Edited by Darmc on Friday 6th of October 2017 09:38:25 AM
-- Edited by Darmc on Friday 6th of October 2017 10:33:34 AM
Yes aluminium and stainless are incompatible. I found out when I used s/steel bolts to fasten an aluminium extension to my roof rack and snapped the s/steel bolts trying to remove them after a couple of years.
Rob.
When I screwed my fridge vents I used the screws already holding the frame part of the plastic vent. Just removed two, one each side and marked their place on the outside cover. A small drill, refit the screws and job done. They're probably cad plated, but in any case they're already painted white so they look OK.
Seems strange to me. Before I retired I worked for a building company on commercial buildings, and all the aluminium frames for the outside of the buildings were screwed together with stainless screws.
Be aware that some of the " stainless " from china rusts. Stainless does not rust so you work that out.
Also, SS screws, etc are brittle & snap quicker than brass, don't bend like steel.
Found that out in Darwin at Radio Australia in the early 70s when we couldn't source roll pins for the air 15Kv transformer.
Warren
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I vaguely recall being told many years ago it depends on which metal is the most "Noble" and the amount of it compared to the "less Noble' metal, or was it the other way round?
-- Edited by zuby on Wednesday 11th of October 2017 02:21:29 PM
