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The above approach is okay. Recommendation is to make up e.g. a 50g/l sulphuric acid and 50g/l Surtec 495 and mix them 1:1.

Dear gr2vessels, Many thank for your helpful comment. I bought this chemical (together with 650RTU and 181) and I have never used it before that is why I do not have any experience about it. I received the related TDS-s as well and I can tell You that Surtec guys are very friendly and they...

Dear All, Does anyone have experience using SurTec 495? What is the best mixing ratio between SurTec 495 and sulphuric acid? Or should I only use sulphuric acid to adjust the pH? I use this chemical at a laboratory level in small quantities.

I had some damaged parts as well recently, but these were small ones and not industrial volume. I did the following: 1. I identify all scrathces and mask them around. 2. I grind the scratches softly using Sotch Brite. 3. I applied Deoxidine 624 4. Then I rinsed the affected area. 5. Finally I...

I've contacted them, but they could not help. Finally I have found a distributor in England. Many thanks! TTMT

Hello, Can anyone tell me the difference between Deoxidine 605 and 624? I cannot find a TDS of 605 on the web. I intend to use one of them for pre-treamtent prior to Alodine 1200 application. These are Henkel products. Many thanks, FK.

Many thanks for the answers!

Thank you, CoryPad, for the tips! One more question: I've run into the same problem with nickel-acetate. I found only nickel acetate tetrahydrate in most of the catalogues, but not nickel acetate. I guess they are not the same (are they?) and I think I should stick to the ECSS. Kind regards, FK

I've found an article from 1997 (Anodizing and Inorganic Black Colouring of Al alloys for Space Applications). It says:". . .Immerse the work in a solution of yellow ammonium sulfide (NH4)2S 20-40g/L for 10 min." Is this the solution of ammonium hydrosulphide? I found a supplier that sells...

Dear All, I am searching for a manufacturer/vendor (in Europe if possible) from where I can order ammonium hydrosulfide for inorganic black dyeing (ECSS-Q-ST-70-03C) of Aluminium, in laboratory conditions (not industrial, just some pieces of Al would be tried out). Please help!

Many thanks for the responses, I will look after MIL-DTL-5541F. The HW itself is a simple box of an experiment, so the main function is to protect what is inside. Touch-up work mainly would be to have a nicer look. This is my first time here in this web-page! Kind regards, any many thanks for...

Dear all, We have a little hardware that has some scratches, and we would like to do some touch-up work on it. The hardware has a MIL-A-8625F TYPE III Class A hard coat. What is your suggestion? Many thanks!