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stainless steel chain
I got hold of a stainless steel chain a while back and
the guy said there was no need to oil it because of the stainlessness. Is that true? And, when I examine the chain now, the plates are indeed rust free, but it appears not so the cylinders in between. Is this common? If so, is it not false advertising? -- underground experts united |
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#2
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stainless steel chain
Emanuel Berg schreef op 15-3-2015 om 11:45:
I got hold of a stainless steel chain a while back and the guy said there was no need to oil it because of the stainlessness. Is that true? And, when I examine the chain now, the plates are indeed rust free, but it appears not so the cylinders in between. Is this common? If so, is it not false advertising? They only good property of stainless is that is doesn't rust. Of course you have to lube the chain. It is common that the cilinders are not stainless, only the outerplates are stainless. Stainless steel chain is a waste of money IMO. Lou |
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stainless steel chain
http://en.wikipedia.org/wiki/Stainless_steel https://www.google.com/#q=METALS+LOW+FRICTION+SURFACE BRASS and bronze are 'slippery'...the Worlds fair Exhibit at the Smithsonian is filled with brass bushinged machinery. Babbit may be slippery..you now Babbit ? http://goo.gl/yxsGlt stainless nuts n bolts at the hardware store are usually weak mmmm like grade 2 or 2+...marine stainless is better and costs more...then there is Chinese stainless, prob Japanese which is prob good, and Americam (maybe) http://www.mcmaster.com/#socket-head-cap-screws/=wbkjjr tap the stainless blue link at bottom chart |
#4
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stainless steel chain
On Sunday, March 15, 2015 at 12:01:00 PM UTC-4, wrote:
http://en.wikipedia.org/wiki/Stainless_steel https://www.google.com/#q=METALS+LOW+FRICTION+SURFACE BRASS and bronze are 'slippery'...the Worlds fair Exhibit at the Smithsonian is filled with brass bushinged machinery. Babbit may be slippery..you now Babbit ? http://goo.gl/yxsGlt stainless nuts n bolts at the hardware store are usually weak mmmm like grade 2 or 2+...marine stainless is better and costs more...then there is Chinese stainless, prob Japanese which is prob good, and Americam (maybe) http://www.mcmaster.com/#socket-head-cap-screws/=wbkjjr tap the stainless blue link at bottom chart sssssssssssssssssssssssssteel http://www.mcmaster.com/#standard-st...sheets/=wbkq6d |
#5
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stainless steel chain
On 3/15/2015 5:45 AM, Emanuel Berg wrote:
I got hold of a stainless steel chain a while back and the guy said there was no need to oil it because of the stainlessness. Is that true? And, when I examine the chain now, the plates are indeed rust free, but it appears not so the cylinders in between. Is this common? If so, is it not false advertising? That is false. Stainless steel suffers galvanic corrosion so easily in salt water that it isn't allowed to be used below the waterline on most types of oceangoing ship hulls. http://www.worldstainless.org/transp...s/shipbuilding http://www.dieselduck.info/machine/0.../corrosion.htm |
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stainless steel chain
On Mon, 23 Mar 2015 06:42:39 -0500, Doug Cimperman
wrote: On 3/15/2015 5:45 AM, Emanuel Berg wrote: I got hold of a stainless steel chain a while back and the guy said there was no need to oil it because of the stainlessness. Is that true? And, when I examine the chain now, the plates are indeed rust free, but it appears not so the cylinders in between. Is this common? If so, is it not false advertising? That is false. Stainless steel suffers galvanic corrosion so easily in salt water that it isn't allowed to be used below the waterline on most types of oceangoing ship hulls. http://www.worldstainless.org/transp...s/shipbuilding http://www.dieselduck.info/machine/0.../corrosion.htm Strange. I lived on a auxiliary powered sail boat for about 15 years and was never aware that stainless wasn't to be used on a boat. In fact the propeller shaft on that boat was stainless and had a bronze propeller mounted on it. I would go further and say that every modern sea going boat I've seen, except for the rare aluminum boat, had a stainless prop shaft. -- Cheers, John B. |
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stainless steel chain
On Mon, 23 Mar 2015 20:27:35 +0000, Phil W Lee
wrote: John B. Slocomb considered Mon, 23 Mar 2015 20:55:38 +0700 the perfect time to write: On Mon, 23 Mar 2015 06:42:39 -0500, Doug Cimperman wrote: On 3/15/2015 5:45 AM, Emanuel Berg wrote: I got hold of a stainless steel chain a while back and the guy said there was no need to oil it because of the stainlessness. Is that true? And, when I examine the chain now, the plates are indeed rust free, but it appears not so the cylinders in between. Is this common? If so, is it not false advertising? That is false. Stainless steel suffers galvanic corrosion so easily in salt water that it isn't allowed to be used below the waterline on most types of oceangoing ship hulls. http://www.worldstainless.org/transp...s/shipbuilding http://www.dieselduck.info/machine/0.../corrosion.htm Strange. I lived on a auxiliary powered sail boat for about 15 years and was never aware that stainless wasn't to be used on a boat. In fact the propeller shaft on that boat was stainless and had a bronze propeller mounted on it. I would go further and say that every modern sea going boat I've seen, except for the rare aluminum boat, had a stainless prop shaft. Not only that, but most boats intended for salt-water use have a sacrificial anode (usually zinc) to prevent galvanic corrosion attacking things like bronze propellers. It is frequently a condition of insurance that such anodes (and their connections) are checked regularly, and replaced when necessary. Losing the blades of your propeller because the anode has corroded away can mean that your insurance won't cover you for either salvage or loss. There's a good description of how they affect corrosion in the Tom Clancy book "Without Remorse" (first book chronologically of the Jack Ryan series, set in the early 70's). The term should probably be "All boats intended for salt water" as even some wooden boats have anodes attached. In fact a few years ago there was a very scholarly article in "Practical Boar Owner" discussing the effect of "too many" anodes on a wooden boat and the damage that could occur. But galvanic corrosion can also occur in a Marina where the shore electrical system has leaks "to ground". -- Cheers, John B. |
#8
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stainless steel chain
On 3/23/2015 8:55 AM, John B. Slocomb wrote:
On Mon, 23 Mar 2015 06:42:39 -0500, Doug Cimperman wrote: That is false. Stainless steel suffers galvanic corrosion so easily in salt water that it isn't allowed to be used below the waterline on most types of oceangoing ship hulls. http://www.worldstainless.org/transp...s/shipbuilding http://www.dieselduck.info/machine/0.../corrosion.htm Strange. I lived on a auxiliary powered sail boat for about 15 years and was never aware that stainless wasn't to be used on a boat.... Not a boat, a ship. And not the whole ship, just the submerged part of the hull. Most enclosed-hull boats I've seen had all kinds of stainless deck fittings and railings. Those are safer to fail and easier to fix than the underside of a 200,000 ton bulk carrier ship tho. |
#9
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stainless steel chain
On Thu, 26 Mar 2015 16:02:15 -0500, Doug Cimperman
wrote: On 3/23/2015 8:55 AM, John B. Slocomb wrote: On Mon, 23 Mar 2015 06:42:39 -0500, Doug Cimperman wrote: That is false. Stainless steel suffers galvanic corrosion so easily in salt water that it isn't allowed to be used below the waterline on most types of oceangoing ship hulls. http://www.worldstainless.org/transp...s/shipbuilding http://www.dieselduck.info/machine/0.../corrosion.htm Strange. I lived on a auxiliary powered sail boat for about 15 years and was never aware that stainless wasn't to be used on a boat.... Not a boat, a ship. And not the whole ship, just the submerged part of the hull. Most enclosed-hull boats I've seen had all kinds of stainless deck fittings and railings. Those are safer to fail and easier to fix than the underside of a 200,000 ton bulk carrier ship tho. The submerged portions of a ship's hull are not made from "stainless steel" for the simple reason that it "costs like hell" to do that. Instead the hull is made from more normal (read cheaper) steel and made thicker by a "corrosion factor" to allow for the thinning of the plating due to corrosion over the life of the vessel. If "stainless steel" were to be reduced in price (probably not likely) and if it became cost wise to do so ships would be built from it. It might be noted that stainless steel yacht hulls have been built and it is rarely done due to cost reasons. Current stainless scrap prices are about $1,560/long ton while common steel scrap is $260, so using that example your boat hull would cost you 6 times as much if made from stainless. The Emma Maersk (the largest ship ever built at the time) cost US $145,000,000 to build. Six times that price and you are talking real money... -- Cheers, John B. |
#10
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stainless steel chain
On 23/03/15 21:42, Doug Cimperman wrote:
On 3/15/2015 5:45 AM, Emanuel Berg wrote: I got hold of a stainless steel chain a while back and the guy said there was no need to oil it because of the stainlessness. Is that true? And, when I examine the chain now, the plates are indeed rust free, but it appears not so the cylinders in between. Is this common? If so, is it not false advertising? That is false. Stainless steel suffers galvanic corrosion so easily in salt water that it isn't allowed to be used below the waterline on most types of oceangoing ship hulls. http://www.worldstainless.org/transp...s/shipbuilding http://www.dieselduck.info/machine/0.../corrosion.htm It seems that on ships hulls it is the low oxygen environment that causes most of the problem. The protective layer cannot form fast enough. On a bicycle chain I doubt this is an issue, unless you throw the bike in the sea... The rollers are likely hardened steel and not so stainless. -- JS |
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