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Thread: Air or Nitrogen in your tires
01-21-2013, 09:59 PM #41
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- Jan 2013
I use air because air is everywhere, nitrogen isn't around enough to randomly get it. On the flip side, a customer bought rims/tires and they were filled with nitrogen, they haven't lost a single psi in 8 months.
01-22-2013, 10:45 AM #42
Not much difference between nitrogen and dry air.
Some folks say that the oxygen in the air binds with the metal in the rim or the rubber in the tire leading to a loss of pressure. I'm not so sure that goes on, and to the extent that it does, it is used up leaving... mostly nitrogen.
You all do check your tire pressures at least once a month, right?Minneapolis area - 1997 K2500 regular cab long bed + 8.5' Western Unimount plow + modified transmission + 2nd battery + modified camper charge circuit + 1971 Cayo camper -and- 2004 4x4 Suburban 2500 8.1 + Maxbrake controller + 2nd battery + modified trailer charge circuit + Reese receiver, pulls 30' Airstream trailer
01-22-2013, 10:55 AM #43
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01-22-2013, 02:28 PM #44
...and having a tire pressure monitoring system is another reason to use the less corrosive nitrogen. ;)Buy Made in USA, The job you save just might be your own.
01-22-2013, 04:55 PM #45
01-23-2013, 10:00 AM #46
Oxygen by nature causes oxidation, without it you wouldn't really have rust etc. With the nitrogen (if you are getting a good more pure fill of it) you have MUCH less Oxygen thus you have less of a reaction. The tire monitoring system is sensitive and thus any corrosion you can keep down from them will make them last longer.
Or if you want a more intelligent reply than I can give. (LOL)
Oxygen gas (O2) is a pretty good oxidant (in fact, the word "oxidize" comes from "oxygen"). This is because oxygen is fairly electronegative. When bonded to itself, it forms a purely covalent bond. In contrast, when bonded to many other elements, in particular to less electronegative metals, oxygen is able to have more electron density for itself. So oxygen gas will react with other elements, such as iron, and then rust or corrode them. Other very corrosive elements are F2, Cl2, and Br2, all for the same reasons -- they are very electronegative, and by combining with something other than themselves, they are able to gain more electrons.
Also note that burning is the same process as rusting, although we don't think of it that way! Both are just something combining with oxygen. Compare the two reactions:
Rusting of iron: 4Fe + 3O2 --> 2Fe2O3
Burning of methane: CH4 + 2O2 --> CO2 + 2H2O In fact, burning is just oxygen combining with the fuel (whether it be wood, oil, gas, coal, or anything else) to form products in which the reactants are oxidized. So oxygen is in fact quite reactive with many things. Usually to get things to burn, you need a spark to get the reaction burning though (there is an activation barrier to the reaction, but it is an very exothermic reaction). Rusting is also quite exothermic, but it is kinetically slow.
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Using good Nitrogen instead of "air" can also keep cheaper aluminum wheels from oxidizing and causing tire leaks as many have had issues with.
01-23-2013, 10:16 AM #47
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- Mar 2007
- Grand Prairie, Texas
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To properly create a non-corrosive environment inside the tire you would need to do a hot purge of dry Nitrogen at 120deg until the tire and rim reached a temperature of 120deg and for not less than 40 minutes to ensure the total space inside the tire was properly purged (given calculations of the average tire size and cubic space inside) anything less than this would not guarantee a total Nitrogen environment, it would be diluted and thus susceptible to corrosion. Which is why the American Gas Standard doesnt endorse servicing tires with Nitrogen since you cant achieve a complete and undiluted Nitrogen fill.
To properly fill and service a tire with Nitrogen would require two valve stems so you had an outlet for the hot purge gases.
01-23-2013, 03:27 PM #48
01-23-2013, 09:26 PM #49
Indeed but every bit that helps slow it down is good with me.
Oxidation does not need much if any moisture to happen. Rust might but even your plastic parts can get oxidation.
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