Recent content by vyv_cox

Definitely carbon steel. Stainless steel will never corrode like that.

No I didn't. They have been in situ for two decades so they might well be galled. Doesn't matter as they are never coming off.

Not necessarily when being tightened. Pressure between the two surfaces, either static or dynamic, tends to squeeze out lubricants allowing metal to metal contact. At pressure they can then weld together. Prevention, as with EP gear lubricants, is to form sulfides on the steel surface. Welding...

That's galling for you! There is no removal process. Galling is welding of the asperities on opposing parts. When my babystay bottlescrew suffered the condition I put the body in a vice and used my 24 inch adjustable on the screw flats, with absolutely no success.

Stainless steel nuts and bolts can gall. E.g. Galling is serious…but there are solutions - Stainless Steel World Standard fasteners prone to galling Standard stainless steel bolts and fasteners have a tendency to gall under certain conditions due to their specific properties.

Mine are A4 50 as far as I know. It's a very long time since I saw them!

Steel bolts, whether galvanised or not, use a simple strength designation marked on the head. For example, the first digit in an 8.8 is the strength (UTS) in megapascals divided by 100 and the second is the yield strength as a proportion of the UTS. These are the lowest grade of what are...

Sorry, I am not qualified or experienced in this technology. You might like to read this All You Need To Know About Coolants - Coolants Technology, Function, & Applications - Valvoline™ Global Europe - EN to understand more about it. Googling gives me many DIY proposals including acids, alkalis...

Yes, exactly that but not the same boat. Windlass installation Has been very successful with no negatives other than not being able to stow the anchor in the locker, not really an issue. I did this 20 years ago, used for two windlasses. However I suggest very strongly that installing a Lofrans...

I have many similar photos from engines all around the world, mostly large. Gas engines, diesel generators, etc. Some in Oman, where they chose not to use any coolant other than water, were particularly bad.

My toerails were varnished when we purchased the boat in 1994. We continued to varnish on a regular basis as the appearance was good. Ultimately we followed the advice of many on here and stripped them to obtain a silver appearance. What a mistake! Over time the surface gradually eroded to...

When I upgraded my genoa winches many years ago I was intending to buy Lewmar 43s. The time was just as Gibb went out of business and the chandlery had a pair of their 52s at a very knock-down price. We bought them and installed them with M8 stainless bolts. They have never given any cause for...

As suggested earlier there are various strength grades in 300 series stainless steels. The standard annealed stuff is 50, but there are also mechanically strengthened grades 70 and 80. So either A2 80 or A4 80 would give even more confidence

A similar story was printed in one of the mags some years ago. I think it was a cockpit locker and the man was in there for some considerable time.

Bearing in mind that the screws are going into potentially wet wood I am not sure any of the suggestions are great. Maybe aluminium bronze would be good, but Duralac is still advisable. ALUMINIUM BRONZE FASTENERS