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




USnavy


Dec 30, 2011, 1:21 AM

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Registered: Nov 5, 2007
Posts: 2661

Re: [j_ung] Polishing bolts to increase their corrosion resistance in marine environments?
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Well I just finished the passivation of 40 of the 316SS Wave Bolts. I followed the directions given here: http://www.mmsonline.com/...tainless-steel-parts

I started by thoroughly washing the parts in water. I than soaked the parts in a 11% concentrate anhydrous citric acid solution that was heated to 150 degrees Fahrenheit in a kettle made out of stainless steel (assuming 304). The bolts were allowed to stand in the solution for 32 minutes. Lastly, I rinsed the parts in water and wiped them off with a cloth. Next I am going to polish them.




As you can see from the picture above, quite a bit of crap came off the bolts. I thoroughly washed and wiped the parts before they entered the bath, so the bath was solely responsible for lifting the grit you see on the cloth.

The manufacturer of the Wave Bolt tells me the parts are not pacified, but they are cleaned of shop debris before they are sent out to the customer.


(This post was edited by USnavy on Dec 30, 2011, 4:13 AM)



Edit Log:
Post edited by USnavy () on Dec 30, 2011, 1:24 AM
Post edited by USnavy () on Dec 30, 2011, 4:12 AM
Post edited by USnavy () on Dec 30, 2011, 4:13 AM


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