Recent content by Ogon Bat

well now I'm turbo pumping... let's try to see how disastrous the situation is.

The inner diamater is 6 cm. For alluminium I cannot go over 180°C

well the tube I hope will be shipped next week and then I will try with turbo pumps to see how things are going... For now, from the net, it seems a good idea to use a chromic acid/phosphoric acid solution...

Thank you for your answer! Unfortunately no, it was a mistake. The anodizing just had to be done externally... the company, absolutely not equipped to prepare UHV components, forgot to protect the inside part. I guess (i.e. I'm sure) that they have done a quite low cost treatment, not specific...

I recently realized a quite long (4.5 m) tube for ultra high vacuum in alluminium. Unfortunately in the realization a terrible error has been made... The internal surface has been anodized! I know that such treatment horribly enhance the outgassing rate... I read over the net that in principle...