Nothing personal Simon, but Iâm hoping that one result of the reboot will be that whenever I log on I will no longer see your profile page as the first thing that appears on my screen! No, I donât know why it does that either, and I have mentioned it to David and Steve and possibly Angus, but that was some time ago and they are all busy guys so I just put up with the extra key-strokes to âget rid of youâ each time it happens
However, while I have an inorganic chemistâs attention I may as well ask you a question if I mayâŚ
Decades ago I obtained a near-unique pair of brand new Amal carburettors never sold to the public, made from magnesium alloy (probably âElektronâ). They were probably from a tiny batch made for the BSA/Triumph competition department for Mike Hailwoodâs Rocket 3. Anyway, although still in their original crepe paper and cardboard wrapping, the surface has darkened slightly and there is slight powdery efflorescence in some places. I was going to ask if you could think of a suitable kitchen chemistry wash I could use to dissolve the crud and possibly brighten up the finish, without turning these valuable items into grey sludge? Any suggestions?
Hi David and other EtypeUK forumersâŚ! i am like a child without his best book or toy âŚ: with the forum failure !!!
But thankâs to JL forum : now i know it will be solved , i am a EtypeUK forum addict⌠iâll be soon happy with the forum live ?
Thankâs David for your huge contribution.
Peter,
Mag alloys, including Elektron, will oxidise dramatically if the surface is not correctly protected.
Magnesium does not develop a protective layer like aluminum alloys. It requires a special chromating treatment (a process using a very toxic chemical, chromic acid), which allows making a protective deposit on it.
Magnesium wheels or cast components for aerospace are protected this way, using the chromating treatment, then powder coating or paint.
Issue for mag carbs is that you probably cannot easily access hidden parts and that you should not allow making all but very thin deposits to keep them functionalâŚ
Here are a few links that describe the chromating process and a product kit for sale (alodine) : https://ptiindustries.com/2014/12/dow-coatings-magnesium-components/ https://www.finishing.com/103/13.shtml https://www.skygeek.com/henkel-598970-alodine-magnesium-treatment-kit.html
Hope it helps
Good man David, if it would help for us/you to fund this and take it in-house, as it were, many of us would happily cough-up ; would just need some sort of halo attachment to preen underneath.
Crespin - if itâs MHâs triple, what good is a pair of carbs to you - think you can hide a manky normal one in the middle ? In Italy, the chromic acid treatment was available in the early 90âs to complete magnesium brake assemblies (already ÂŁ1.000 a pop) that were dipped in a bucket - kept in the pool-house - upon the customerâs request for a yellow finish, forgotten for an hour or so, and then urgently dunked in the retailerâs swimming-pool to stop the process. Ask me how I know. And how I know chromic acid ruins bearings, cams, brake linings etc âŚ
Merci Serge.as you say, for a carb it is difficult to know every tiny drilling or inside part is covered and dimensional change, as with paint, would be verboten. Maybe Iâll just store them in a bucket of WD40. E10 probably too risky.
I bought the only two available Rory, for my Covenant Commando Norton twin (UK forum Avatar). It is just about 300lb dry without any use of unobtanium. With a pair of light wheels and tubless tyres and the magnesium carbs Iâd probably be something like 290-295, which is dirt bike territory, or the weight of a normsl Commando sans engine & gearbox. As Tesco put it, âEvery little helpsâ.
I now have access to the host web site but I still need to get through another password firewall to manipulate the control panel and access the Forum files. I am working on retrieving those log in credentials.
Once I am in it âshouldâ be a simple job to fix the problem and at least I will be in full control.
David, I can only echo what others have stated. We really appreciate all of the hard work that you have done over the years on E Type UK forum and particularly the past two weeks to get it back up and running.