Advice please
My recently installed Ronstan rigging screws are showing substantial corrosion after only a few months
The chain plates are not affected
I am concerned that the ss is not up to standard
I will be getting Ronstan to inspect but i wondered if anyone had experienced this

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scaramouche said...
[br]Advice please
My recently installed Ronstan rigging screws are showing substantial corrosion after only a few months
The chain plates are not affected
I am concerned that the ss is not up to standard
I will be getting Ronstan to inspect but i wondered if anyone had experienced this

I do know some people wrap those with lanolin for protection seems very quick to go like that


the above and blow I am not sure how lone but at least 2 years I just scrubbed mine a couple of weekends ago

after lifting her out these photos are as it was bought 2 months a ago at least







The above would probably be 25 years old not sure but there going to be changed with in the next three

doesn't look too bad to me personally. I'm assuming its a grp hull and deck so there should be no current but id still check if possible. The green looks a little odd. check for pitting in the metal.
very thin surface rust was the norm on my grp with a similar rigging set up.

Ronstan did have a issue with rigging screws about 3 years ago . There was a issue with some failing and they did a recall and exchange of certain sizes .
I don't know how to post a link but iff you google ronstan recall rigging screws you will find the info
This may not be related to your corrosion
Pilgrim

Those photos just look like surface rust to me, but I'm no expert. Good idea getting Ronstan to look at it, then the onus is in their hands.

Surprise! Stainless steel will stain, that is to say it won't leave a stain on anything but it will get stains and that's what it looks like yours has done. Try polishing it with a good metal polish and see if comes off and then wait to see if or how long it takes to reappear.

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LooseChange said...
Surprise! Stainless steel will stain, that is to say it won't leave a stain on anything but it will get stains and that's what it looks like yours has done. Try polishing it with a good metal polish and see if comes off and then wait to see if or how long it takes to reappear.

I think I used oxalic acid mixed with water cant remember right now took off all my stains made then all my stainless shine once again just sprayed it on and left it for a while and wiped it off worked a treat

I Agree with HGO2,
It is most likely contamination either from the tooling or from where and how they were stored. By cleaning them with the right acid the carbon contaminants will be mostly removed and should stay shiny for longer

www.mmsonline.com/articles/how-to-passivate-stainless-steel-parts

Could be wrong (again) but my understanding is that Stainless Steel is an alloy and protects itself just like aluminum does. Hence the tea stain. Elbow grease and polish is a normal part of boat maintenance but there are a few products you can buy to help out. "Spotless Stainless" or Star brite's "Rust Stain Remover". I'm always a bit weary of applying any product that needs to be washed out after a certain time to places like rigging screw where I can't be certain of getting it all out. Just remember that stainless steel needs oxygen to protect itself. Never do something to it to deprive it of oxygen like taping up turn buckles that might result in d-oxygenated water being trapped around the fitting or you may get "crevice corrosion". (you can Google that one for enlightenment)

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scaramouche said...
[br]Advice please
My recently installed Ronstan rigging screws are showing substantial corrosion after only a few months
The chain plates are not affected

Are you sure????

If your chain plates have been in place for many years you should unbolt them and inspect the unexposed side of them. You may find a scene of rampant corrosion and impending failure.

Stainless steel without exposure to oxygen will corrode badly.

Thanks or the great range of responses
Ronstan a response to photos was the "tea staining" due to contamination in yard.
Seriously prompt response from md! Very impressed.
Pitting of stainless steel has occur red so not tea staining.
Waiting to get them to have a look ,but many options seem to indicate this explanation is a possibility,rather than poor quality ss.
Thanks again.