Forums: Climbing Information: The Lab: Re: [mattm] Polishing bolts to increase their corrosion resistance in marine environments?: Edit Log


Dec 23, 2011, 2:31 AM

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Re: [mattm] Polishing bolts to increase their corrosion resistance in marine environments?
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mattm wrote:
Bolt Products passivates their bolts (I assume that's who you're referring too). Note that 316SS won't be that great in nasty marine environs. I'm betting you know that too though...
Bolt Products use Duplex SS in their marine bolts.
Yep, I am referring to Bolt Products. I know 316 is not the best grade you could use in nasty marine environments, fortunately our marine environment is a bit less harsh than others' such as Thailand. Yep, their Sea Water Series bolts are made out of 2205 SS. We normally use titanium here. I am just exploring a few different options.

I bought the Barkeeper's Friend and I will give it a try. However I am trying to treat new bolts, not used ones. I wanted to polish them in an effort to maximize their life before installation. I looked at the picture of the 2205 bolts listed on Bolt Product's website. In the picture it appears the exposed part of the bolt is shinier than the rest of the bolt. This implies they buff it. It seems like a good idea, but will generic stainless steel buffing clay do the trick, or will that do more harm than good?

As far as the passivization with oxalic goes, I have always wondered if oxalic actually passivates SS or not.

The link below shows that 300 series SS should be passivated with nitric acid and critic acid, with a submersion time of 30 min in each bath and each bath needs to be heated.

(This post was edited by USnavy on Dec 23, 2011, 2:53 AM)

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Post edited by USnavy () on Dec 23, 2011, 2:53 AM

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