Forums > Kitesurfing General

Corrosion basics for kiteboarders.

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Created by Plummet > 9 months ago, 22 Jun 2019
Plummet
4862 posts
7 Jul 2019 9:40AM
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eppo said..

cauncy said..
This is like being back at school
FuC#ing Shidt




I'm with you mick and I did a metallurgy degree looking closely at processes such as electrolysis... bad flash backs pouring over complex phase diagrams ... please stop. Lube your ass then wash your Sh1t... done.


You can choose not to read it if you want too!....

Plus there's some interesting dudes so I will continue.

Let us now now discuss galling.

Plummet
4862 posts
7 Jul 2019 9:57AM
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What is galling?

Galling is when two threads bind together and seize. It can be fairly common when using stainless steel fasteners. This seizing or 'cold-welding' can result in fasteners having to be cut away as un-threading is impossible. Try to picture a small ball of material tearing away from the thread and balling up like a snowball. The more you wind the thread the bigger the snowballing effect.

Why does stainless gall more so than offer steels? Stainless is relatively soft material by comparison to carbon steels. Soft material are more susceptible to galling. Stainless also has terrible heat transfer which may exacerbate the effect.

How do we stop calling?

Use a lubricant. This will reduce friction and heat build up.
Clean the threads out. Remove any foreign particles like sand.
Inspect fastener for damaged threads. do not install damaged bolts.
Reduce installation speed. Fast winding of the fastener can create additional heat and friction.

If you feel an unusual tightness when doing the thread up. Stop immediately. Slowly back off the fastener. Inspect, repair, lubricate, clean and try re-installing.












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"Corrosion basics for kiteboarders." started by Plummet