Keyboard Shortcuts
Likes
Search
OT: Anodizing aluminium ...
|
I have made a box for a pcb I have created that needs screening but the plain aluminium look is a bit boring and prone to scratching.
A friend suggested anodizing as it toughens the surface and he had heard that they can then be coloured with die. I am intrigued and would like to give it a try but has anyone any experience of doing this or can point me in the right direction ??? Thanks in advance, Dave |
开云体育You tube. Lots of stuff. You will need power sulfuric acid and? I believe lead. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: David Slipper <softfoot@...> Date: 12/2/19 1:21 PM (GMT-07:00) Subject: [homebrewpcbs] OT: Anodizing aluminium ... I have made a box for a pcb I have created that needs screening but the plain aluminium look is a bit boring and prone to scratching. A friend suggested anodizing as it toughens the surface and he had heard that they can then be coloured with die. I am intrigued and would like to give it a try but has anyone any experience of doing this or can point me in the right direction ??? Thanks in advance, Dave |
|
toggle quoted message
Show quoted text
Check Caswell first: ? to get an idea of whats involved and the cost. Then check youtube for some other cheaper methods: ? |
开云体育Cant buy sulphuric acid in the UK now - been told that sodium bisulfate solution is almost as good. Dave
On 02/12/2019 21:04, roger wrote:
|
|
Why on earth can't you buy sulphuric acid in the UK?
toggle quoted message
Show quoted text
Doug?
|
开云体育A knee jerk reaction to some acid
attacks. You need a license to purchase over 15% concentration
unless it is in a battery. You can get up to 2 years in jail for
possessing or selling the stuff without a license.
To get a license you have to pay (of
course), get a doctor's report and have a clean record with the
police.? If you have had any mental illness or depression in the
last 10 years forget about getting a license.
Les
On 03/12/2019 19:35, Doug Pfaff via
Groups.Io wrote:
Why on earth can't you buy sulphuric acid in the UK? |
开云体育Because idiots kept on throwing it into people’s faces. It was happening roughly twice per day in 2016/7 according to wiki.
|
开云体育On 04/12/2019 16:18, Dave wrote: I don't think NaOH would work - some people use it to etch the
aluminium prior to anodizing (gives a better finish seemingly)?
but you need an acid for the actual anodizing. I'm told that sodium bisulfate behaves like sulphuric acid when
in solution under electrolysis. I have no experience at all in this, I am NO chemist (well just
what I remember from "O Level" chemistry way back in 1964 !!). Dave
Steven, |
|
Did you click on the links? NaOH is just part of the process.
toggle quoted message
Show quoted text
On 04/12/2019 16:18, Dave wrote:
I don't think NaOH would work - some people use it to etch the aluminium prior to anodizing (gives a better finish seemingly)? but you need an acid for the actual anodizing. -- Steven Greenfield AE7HD |
开云体育NaOH (Sodium hydroxide aka lye aka drain cleaner) is mainly used to degrease the part, gets that last bit of crap off. ? It’ll strip the oxide layer off as well, and giving the part a slight etch probably isn’t a bad idea.? It’ll eat the part completely if left in too long – try it with a drink can.? You wind up with the plastic layer. ? Tony ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Steven Greenfield AE7HD via Groups.Io
Sent: Monday, 9 December 2019 10:35 AM To: [email protected] Subject: Re: [homebrewpcbs] OT: Anodizing aluminium ... ? Did you click on the links? NaOH is just part of the process. On 04/12/2019 16:18, Dave wrote: I don't think NaOH would work - some people use it to etch the aluminium prior to anodizing (gives a better finish seemingly)? but you need an acid for the actual anodizing.
|
开云体育the sodium hydroxide is both a surface cleaner and acts as an
electrolytic cavitator in the process.
On 12/8/2019 9:08 PM, Tony Smith wrote:
|
Steven Greenfield AE7HD