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awilson86
Nov 19, 2006, 9:18 PM
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what causes the rubber on your shoes to oxidate?
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space_man
Nov 19, 2006, 9:25 PM
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Things oxidize when they're combined with oxygen.
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gunkiemike
Nov 19, 2006, 10:00 PM
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The process is accelerated by high temperature and the presence of ozone (from electric arcing or urban air pollution) and ultraviolet light. So basically, that's the entire southern US in summertime.
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thomasribiere
Nov 19, 2006, 10:40 PM
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Can the rubber get oxidized? What does it look like? Does the color change? And its friction properties as well?
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thomasribiere
Nov 19, 2006, 10:52 PM
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All my gear is stored in a dark, dry, 70°F, sane environment.
And as I have no digital camera, I can't take a pic of my shoes.
I knew that rubber could be vulcanised (naturally vulcanised too?), but not oxidized.
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awilson86
Nov 19, 2006, 11:01 PM
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the reason i ask is because i went down to the local boulder (granite) yesterday and everytime i put my foot down, it felt like it wasnt going to stick. maybe it was because the rock was still abit wet but it felt like the soles were no longer sticky after 3 months of off and on use.
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awilson86
Nov 19, 2006, 11:15 PM
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nah. it just feels slick compared the the first time i climbed outdoors a few months ago. i went to the gym yesterday, after having no luck on the real stuff and they fell abit better after some of the dirt came off. gonna grab some steel wool and rough em up a bit and remember to bring some carpet or something next time around.
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ihateslopers
Nov 20, 2006, 6:07 AM
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In reply to: Things oxidize when they're combined with oxygen.
actually, things oxidize when they lose electrons
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awilson86
Nov 20, 2006, 10:45 PM
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In reply to: In reply to: nah. it just feels slick compared the the first time i climbed outdoors a few months ago. i went to the gym yesterday, after having no luck on the real stuff and they fell abit better after some of the dirt came off. gonna grab some steel wool and rough em up a bit and remember to bring some carpet or something next time around. Some sort of pot scrubber helps when climbing, not to rough them up but to get dirt and stuff off them. All my serious falls resulted from climbing with dirty shoes and most of my fear results in bad foot placement faith. :) slickl stone ya that sucks.
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charley
Nov 20, 2006, 11:14 PM
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I had on a pair of shoes yesterday that were about twelve yearsold. The rubber stuck fine, but damn they still hurt. They were to small and I wore them very little and then I replaced them. I put them on to see if they would magically get me up 5.10's.  Did not get up anything harder and seemed to climb the same on often done boulder problems. They hurt like hell.
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petsfed
Nov 20, 2006, 11:40 PM
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In reply to: In reply to: the reason i ask is because i went down to the local boulder (granite) yesterday and everytime i put my foot down, it felt like it wasnt going to stick. maybe it was because the rock was still abit wet but it felt like the soles were no longer sticky after 3 months of off and on use. Hmm sounds like water and your shoes getting worn smooth, some steal wool would rough them up a but (not too much, wear right through). I was picturing this shoe that was flaking apart :)
Also, a stiff wire brush can do wonders, but that's only after a long time without using them. You'll see some low level oxidation after two or three weeks that looks an awful lot like chalk that will come off just by rubbing the rubber with your fingers. Either way though, its a thin layer of former-rubber that has been chemically changed into a compound that's less sticky, via an oxidation process. Kind of like rust.
Best solution? Climb more. 
(This post was edited by petsfed on Nov 20, 2006, 11:40 PM)
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gunkiemike
Nov 20, 2006, 11:44 PM
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In reply to: In reply to: Things oxidize when they're combined with oxygen. actually, things oxidize when they lose electrons
Metal atom one - "Dude, check it out, I'm OXIDIZED"
Metal atom two - "Are you sure?"
One - "Yes, I'm POSITIVE."
{rimshot}
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alpinismo_flujo
Nov 20, 2006, 11:50 PM
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Rubbing alcohol will clean all the dirt off - but the next time to go climbing outdoors, I bet it magically reappears
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zealotnoob
Nov 21, 2006, 12:00 AM
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In reply to: In reply to: In reply to: Things oxidize when they're combined with oxygen. actually, things oxidize when they lose electrons Metal atom one - "Dude, check it out, I'm OXIDIZED" Metal atom two - "Are you sure?" One - "Yes, I'm POSITIVE." {rimshot}
Oh boy...
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ihateslopers
Nov 21, 2006, 5:57 AM
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good one!
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sungam
Nov 21, 2006, 1:31 PM
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Well, it wasn't as good as when my chemistry teacher said it. His went along the lines of this, with big egsagerated voices and actions:
A chlorine atom walks up to an iron atom and suddenly starts crying.
The Iron atom says "what's wrong dude?"
the Cl replies "I've lost an electron dude! I've been oxidised!"
Fe replies "how do you know? are you sure?"
Cl says "yes! I'm positive!"
And which point the entire class went slent, and there was Mr Lumsden with his arms like "ta da" with a big slime on. That's when we started laughing... AT him.
-Magnus
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gunkiemike
Nov 21, 2006, 9:06 PM
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In reply to: The Iron atom says "what's wrong dude?" the Cl replies "I've lost an electron dude! I've been oxidised!" Fe replies "how do you know? are you sure?" Cl says "yes! I'm positive!" And which point the entire class went slent,
Maybe because the class realized that chlorine will not LOSE an electron, but rather GAIN an electron to become a chloride anion.
OK, GEEK MODE off. 
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seanhabgood
Nov 22, 2006, 12:46 AM
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Copper and uv light can cause rubber to break down as well. sean
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learnedongreenline
Nov 22, 2006, 7:32 PM
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All rubber oxidizes due to air, light etc. If your shoes are oxidizing at a extreme rate then it is possible that the batch of rubber they were made out of did not have the proper amount of anti-oxidants added. If your old rubber items (usally the black natural rubber) have white on them that is usally the old anti-oxidant coming out of the rubber. If your shoes are not sticking it could be due to temperature or other issues. If they are oxidizing they will probally just fall apart or become brittle.
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catbird_seat
Nov 22, 2006, 8:56 PM
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If the rubber of your rock shoes is getting oxidized it is proof positive that you NEED TO GET OUT CLIMBING MORE OFTEN.
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awilson86
Nov 22, 2006, 10:31 PM
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In reply to: If the rubber of your rock shoes is getting oxidized it is proof positive that you NEED TO GET OUT CLIMBING MORE OFTEN.
sure.. would you like to send me money for my rope or gym membership via check or paypal?
until then, stop telling people that cant afford to climb as often as they would like to to climb more.
unless you have some money to spare.
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catbird_seat
Nov 23, 2006, 8:24 PM
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I just gave up having a cell phone so I could better afford my gym membership. It's all about priorities.
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