RMweb Premium PhilJ W Posted November 24, 2022 RMweb Premium Share Posted November 24, 2022 11 hours ago, Compound2632 said: A quick bit of insomniacal googling demonstrates that "mazak" is a term known only to British railway modellers; the usual name for this family of alloys is "zamak". It seems that "Mazak" was formerly a trade name but when and by whom is obscure; it is now the name of a Japanese brand of machine tools, with a factory in Worcester. Zamak, on the other hand, is also the word for "castle" in a number of Slavonic languages. IIRC Mazak (or Zamak) is an alloy of Zinc and Magnesium with a few other metals sometimes included. It is the proportions of some of these metals that can lead to Mazak rot. 1 Link to post Share on other sites More sharing options...
MrWolf Posted November 24, 2022 Share Posted November 24, 2022 I was always told when I was involved in engineering, that mazak rot was caused by impurity in the mix, which is why major users had got on top of the problem in the 1940s, of course, there's always mistakes, sourcing / traceability or QA issues and the old problem of: "There is nothing a man can make that another man cannot make a little cheaper and a little less well." https://en.m.wikipedia.org/wiki/Zamak 3 Link to post Share on other sites More sharing options...
Michael Hodgson Posted November 24, 2022 Share Posted November 24, 2022 6 hours ago, Paul H Vigor said: So, the GWR could have added Zamak Castle to the 4073 class? 🥸 I thought that was one Hornby did ? 2 Link to post Share on other sites More sharing options...
RMweb Gold Hroth Posted November 24, 2022 RMweb Gold Share Posted November 24, 2022 (edited) 6 minutes ago, Michael Hodgson said: I thought that was one Hornby did ? You'd have to examine the "Mazak Rot" list elsewhere in RMweb. However, I might rename my R2880 9F "Zamak Castle" and renumber it as one of the Swindon built 9Fs..... Edited November 24, 2022 by Hroth Spotted a mistype as I hit Submit... 1 3 Link to post Share on other sites More sharing options...
6990WitherslackHall Posted November 24, 2022 Share Posted November 24, 2022 6 hours ago, Paul H Vigor said: So, the GWR could have added Zamak Castle to the 4073 class? 🥸 It's name would be Castle Castle then. 1 1 1 Link to post Share on other sites More sharing options...
Paul H Vigor Posted November 24, 2022 Share Posted November 24, 2022 11 minutes ago, 6990WitherslackHall said: It's name would be Castle Castle then. Yes. With a Cornish twist! https://sh.wikipedia.org/wiki/Zamak_Tintagel 1 Link to post Share on other sites More sharing options...
RMweb Gold Corbs Posted November 24, 2022 RMweb Gold Share Posted November 24, 2022 2 hours ago, MrWolf said: I was always told when I was involved in engineering, that mazak rot was caused by impurity in the mix, which is why major users had got on top of the problem in the 1940s, of course, there's always mistakes, sourcing / traceability or QA issues and the old problem of: "There is nothing a man can make that another man cannot make a little cheaper and a little less well." https://en.m.wikipedia.org/wiki/Zamak Someone told me that even just leaving the wire wrapping on the zinc when you throw it into the melting pot can lead to Mazak rot. 14 minutes ago, 6990WitherslackHall said: It's name would be Castle Castle then. Ahhh just like River Avon? 2 1 2 1 Link to post Share on other sites More sharing options...
Paul H Vigor Posted November 24, 2022 Share Posted November 24, 2022 25 minutes ago, Corbs said: Someone told me that even just leaving the wire wrapping on the zinc when you throw it into the melting pot can lead to Mazak rot. Ahhh just like River Avon? Yes indeed! 😎 1 Link to post Share on other sites More sharing options...
TimberValleyRailway Posted November 24, 2022 Share Posted November 24, 2022 Amazon are mad. 8 Link to post Share on other sites More sharing options...
RMweb Premium John Besley Posted November 24, 2022 RMweb Premium Share Posted November 24, 2022 Looks like TMC have jumped onto the scrap line as well... £78.00 Looks like something from Harrow and Wealdstone October 1952 2 3 Link to post Share on other sites More sharing options...
MrWolf Posted November 24, 2022 Share Posted November 24, 2022 Is that rust scabs or some previously unknown form of locomotive leprosy? 2 1 Link to post Share on other sites More sharing options...
Paul H Vigor Posted November 24, 2022 Share Posted November 24, 2022 8 minutes ago, MrWolf said: Is that rust scabs or some previously unknown form of locomotive leprosy? Looks like it's contracted some kind of nasty LTI?? 1 Link to post Share on other sites More sharing options...
RMweb Gold 96701 Posted November 24, 2022 RMweb Gold Share Posted November 24, 2022 5 hours ago, Corbs said: Someone told me that even just leaving the wire wrapping on the zinc when you throw it into the melting pot can lead to Mazak rot. Ahhh just like River Avon? Also River Ouse and Lake Windermere. 2 1 Link to post Share on other sites More sharing options...
RMweb Gold Hroth Posted November 24, 2022 RMweb Gold Share Posted November 24, 2022 6 hours ago, Corbs said: Ahhh just like River Avon? 33 minutes ago, 96701 said: Also River Ouse and Lake Windermere. Torpenhow too... As for Mazak rot 6 hours ago, Corbs said: Someone told me that even just leaving the wire wrapping on the zinc when you throw it into the melting pot can lead to Mazak rot. I understand that was found to be the root of the problem when Meccano had their outbreak of the Rot. (Mind you, I "understand" a lot of things, that might not be entirely factual... 🤪) 2 Link to post Share on other sites More sharing options...
MrWolf Posted November 25, 2022 Share Posted November 25, 2022 That would definitely create impurities, particularly if it was soft iron wire even though it wouldn't melt at alloy temperatures and of course be scooped out as slag. 1 1 Link to post Share on other sites More sharing options...
RMweb Gold 96701 Posted November 25, 2022 RMweb Gold Share Posted November 25, 2022 1 2 Link to post Share on other sites More sharing options...
RMweb Gold Bucoops Posted November 25, 2022 RMweb Gold Share Posted November 25, 2022 "Optimistic" comes to mind https://www.ebay.co.uk/itm/314241141012 that's the polite version anyway. 4 Link to post Share on other sites More sharing options...
RMweb Premium kevinlms Posted November 25, 2022 RMweb Premium Share Posted November 25, 2022 11 hours ago, John Besley said: Looks like TMC have jumped onto the scrap line as well... £78.00 Looks like something from Harrow and Wealdstone October 1952 You mean it doesn't come with it's box - not interested, then! 5 Link to post Share on other sites More sharing options...
RMweb Premium John M Upton Posted November 25, 2022 RMweb Premium Share Posted November 25, 2022 (edited) 1 hour ago, Bucoops said: "Optimistic" comes to mind https://www.ebay.co.uk/itm/314241141012 that's the polite version anyway. Espcially as the original sale price (£40.00) is still clearly displayed on the packaging... Edited November 25, 2022 by John M Upton 5 Link to post Share on other sites More sharing options...
6990WitherslackHall Posted November 25, 2022 Share Posted November 25, 2022 14 hours ago, TimberValleyRailway said: Amazon are mad. That's a strange looking pannier tank. 3 1 Link to post Share on other sites More sharing options...
RMweb Premium John Besley Posted November 25, 2022 RMweb Premium Share Posted November 25, 2022 3 hours ago, Bucoops said: "Optimistic" comes to mind https://www.ebay.co.uk/itm/314241141012 that's the polite version anyway. Interesting seeing as it was originally £40.00 when where they produced? 3 Link to post Share on other sites More sharing options...
RMweb Gold Hroth Posted November 25, 2022 RMweb Gold Share Posted November 25, 2022 (edited) 15 hours ago, TimberValleyRailway said: Amazon are mad. 1 hour ago, 6990WitherslackHall said: That's a strange looking pannier tank. Its in Improved Engine Green too... Must be a Terrier! Edited November 25, 2022 by Hroth An extra thort 5 Link to post Share on other sites More sharing options...
Michael Hodgson Posted November 25, 2022 Share Posted November 25, 2022 1 hour ago, Hroth said: Its in Improved Engine Green too... Must be a Terrier! That doesn't look like an improved engine. 1 3 Link to post Share on other sites More sharing options...
RMweb Premium 5944 Posted November 25, 2022 RMweb Premium Share Posted November 25, 2022 22 hours ago, PhilJ W said: IIRC Mazak (or Zamak) is an alloy of Zinc and Magnesium with a few other metals sometimes included. It is the proportions of some of these metals that can lead to Mazak rot. It's described in other countries (or at least Google translate interprets as such) as zinc pest. 2 Link to post Share on other sites More sharing options...
MrWolf Posted November 25, 2022 Share Posted November 25, 2022 I prefer Monkey Metal Malaise... 1 1 Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now