Hello again, i followed your instructions, read the LCD-manual. But i still have the problem.
Im just not getting that nice finish after the anodization-process. I get marks running in the same direction of the tube, on some side more marks than the other side, still theres marks.
The marks are in a darker color.
My current setup is: 5% acid, im using a rectifier that gives 77 mA
on a piece thats 16 sq. cm and im anodizing for about 90min.
Ive checked the process and can almost instant see the marks coming, and when i pick up the part it has a pretty hard surface but still a ugly appearance.
Ive tried severals ways of cleaning and prepping the part; ive polished it, used chemicals to remove fats and washed it in detergent and been careful handling it and finishing it off with dest. water.
For connection i use a Aluminium rod which i drilled holes into (and is connected to the rectifier), and then titanium wires that just fits the holes and are fixed with screws from the side. I really dont believe theres a connection problem. My cathode consits of a leadpart. The acid is made by 3:1 dest. water - battery acid.
Can someone please explain why i get this result, im happy with the hardness of the surface, but i also want my parts to look good.
I wish i could send you a picture, but theres no way i can do that atm, hopefully someone recognizes the problem or can give a hint whats causing it.
Ill try demonstrating it with some ascii skillz
__________
|--- _ _ --- |
| ------- __ |
|__--___--_ | << My anodized tube with the marks ALWAYS running the same way as the tubes lengthaxel
Thank you in advance.
