| Author | Message | ||
     John Dare Grand Master Username: jgdare Post Number: 225 Registered: 12-2004 |
I have recently had the top radiator hose, thermosat (top) housing outlet replaced in the R-type, for despite having an "as new" appearance during engine re-build 5 years ago, it had corroded rather quickly it would seem. I have changed my coolant 3 times since year 2000. In a reference to remanufactured S2/3 water pump impellers (U.S RROC's "Flying Lady" magazine) the author mentioned "NON corrosive aluminium". Is there such a type of Aluminium, or are some types, for whatever reason, simply more resistant to corrosion? | ||
| Bill Coburn Grand Master Username: bill_coburn Post Number: 349 Registered: 4-2003 |
John I have always assumed that that bit is the sacrificial anode of the engine akin to those fastened to ships. The theory is that these bits will rot before the main engine. Lately I have been finding the 'nozzle' from the engine to the thermostat on the early vee eights has been gobbled more than anything else. | ||
| Gordon Norris Experienced User Username: crewes_missile Post Number: 48 Registered: 2-2005 |
John, The alloy make-up will determine corrosion resistance, as well as the other electrolytically active metals in the circuit. Some bits, as suggested by Bill, are designed to be sacrificial, to corrode faster to save more expensive bits from corroding. Sometimes it's an oversight! As for NON-corrosive aluminium - strictly speaking, it doesn't exist. It is simply all relative, with some alloys more resistant as noted above. Even stainless steel will corrode. Hpoe this helps, GN. | ||
| David Gore Moderator Username: david_gore Post Number: 406 Registered: 4-2003 |
At last; every Metallurgist's dream is revealed for public scrutiny: We spend 24 hours each day/7 days each week/52 weeks each year thinking of the alloy which will be cheap and easy to make, easy to cast/forge/machine/fabricate, easy to paint/coat/finish and above all resist wear, fatigue, heat and corrosion. A royalty of $0.01 per kilogram will give an income that would exceed Bill Gate's most optimistic dream.  The "reality stick" has been used and I am now back in the real world!! The increased corrosion rate observed is most likely the consequence of using recycled Aluminium rather than virgin metal as the basis of the casting alloy. The incidental elements found in Aluminium scrap which has not been sorted by composition may reduce corrosion resistance in wet but not affect resistance in atmospheric environments for castings made from it. | ||
| Gordon Norris Frequent User Username: crewes_missile Post Number: 52 Registered: 2-2005 |
David, I think Hensteethium or Unobtainium will fit the bill for your alloy requirements...  GN. (Message edited by david_gore on March 10, 2005) (Message edited by david_gore on March 10, 2005) | ||
| David Gore Moderator Username: david_gore Post Number: 409 Registered: 4-2003 |
Hi Gordon, The alloy "Delirium" keeps coming to mind  Regards David PS Originally included this as a comment to your post then decided it should be on its own hence edit details above | ||
| John Dare Grand Master Username: jgdare Post Number: 236 Registered: 12-2004 |
As a young lad I can recall my machinist (Defence Dept.) father bringing home small "medicine" bottles containing "swarf" samples of various metals, each dutifully marked with the type therein. Perhaps he was attempting to steer me toward a higher paying career in metallurgy, given that he had not had the opportunity to attend University himself; periodically reminding me that the Chief Engineer (whom he held in awe) had a 4-1/4L "Bentley". I can clearly remember Duralumin (Alum. alloy) and seem to recall from "year 8" science class (the dreaded Mr.Burns) that Deterium (oxide of) was commonly known as "heavy" water. Is Delirium an alloy of both (or more) of these, and if so, what would be its likely suitability for automotive thermosat housing outlets as normally made of aluminium, which, as previously advised, can suffer from accelerated corrosion due to impurities etc. | ||
| David Gore Moderator Username: david_gore Post Number: 410 Registered: 4-2003 |
Webster's Dictionary says it all: Delirium \De*lir"i*um, n. [L., fr. delirare to rave, to wander in mind, prop., to go out of the furrow in plowing; de- + lira furrow, track; perh. akin to G. geleise track, rut, and E. last to endure.] 1. (Med.) A state in which the thoughts, expressions, and actions are wild, irregular, and incoherent; mental aberration; a roving or wandering of the mind, -- usually dependent on a fever or some other disease, and so distinguished from mania, or madness.} Also defined by Wordnet as below: delirium n 1: state of violent mental agitation [syn: {craze, {frenzy}, {fury}, {hysteria}] 2: a usually brief state of excitement and mental confusion often accompanied by hallucinations.} | ||
| Robert Wort Grand Master Username: robert_wort Post Number: 133 Registered: 12-2004 |
With John's Deuterium (Heavy Water), we may well have to re-calculate the horsepower or kilowatts by using E=mc2 and our power to weight ratios may then be referred to as critical mass  | ||
| Patrick Lockyer. Grand Master Username: pat_lockyer Post Number: 350 Registered: 9-2004 |
Crumbs Ho Hum! so that is what it is,the list is getting larger!heheeeeeeeee. | ||
| John Dare Grand Master Username: jgdare Post Number: 238 Registered: 12-2004 |
In conclusion if I may. A review of my original concern posed two questions, i.e what might cause accelerated deterioraton of an aluminium alloy and secondly, if a NON-corrosive alum. alloy was commercially available, as implied by U.S based sources. Mr. Gore kindly clarified these questions and suggested that lower grades of aluminium may have created the condition which led to my original problem. Had I not accidentally detected the corroded condition, I believe that one day, possibly miles from home, the top radiator hose would have detached (with part of the housing inside it) to result in sudden and dramatic loss of coolant. I have since established that the affected housing was one of a batch made interstate approx. 10 years ago and it is possible, if not probable, that the material used was of dubious quality. The new replacement has been sourced locally with base material from a different origin and its rate of corrosion will be closely monitored over the next few years. I hope to be able to periodically report for the benefit of others. | ||
| Gordon Norris Frequent User Username: crewes_missile Post Number: 54 Registered: 2-2005 |
Robert, David, Pat, and John, So that's why so many RR's have sagging springs...the "heavy" water in the cooling system and the "critical mass" around the wives/girlfriends derrieres all straining the suspension.. ..sorry, I think we are all getting off the thread and David will scold us soon.... | ||
| John Dare Grand Master Username: jgdare Post Number: 240 Registered: 12-2004 |
To Bill and Gordon. My most HUMBLE apologies for not mentioning (as above at 6:07) your mutual input as kindly provided on March 8/9th. Embarrassed I am. | ||
| David Gore Moderator Username: david_gore Post Number: 411 Registered: 4-2003 |
Thank you everyone for some light-hearted humour that I am sure has brightened everyone's day. Now back to more immediate concerns. |
