English Amiga Board


Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 01 February 2019, 18:05   #1
solarmon
Registered User

 
Join Date: Dec 2018
Location: UK
Posts: 122
Amiga 1200 - dealing with rust

Hi,

What is the common/general consensus of what to do with rusted shielding?

Should it just be scrapped? Does the Amiga really need it?

Or should I try to restore it? If so, what is the best method?

Cheers!
Attached Thumbnails
Click image for larger version

Name:	IMG_20190201_130633.jpg
Views:	86
Size:	692.4 KB
ID:	61861   Click image for larger version

Name:	IMG_20190201_124432.jpg
Views:	72
Size:	499.2 KB
ID:	61862  

Last edited by solarmon; 02 February 2019 at 02:14.
solarmon is online now  
Old 01 February 2019, 21:05   #2
deladrevoc
Not enough time

deladrevoc's Avatar
 
Join Date: Dec 2014
Location: England
Posts: 26
This may give you some ideas, from 6 mins 20:

[ Show youtube player ]
deladrevoc is offline  
Old 02 February 2019, 02:03   #3
pandy71
Registered User
 
Join Date: Jun 2010
Location: PL
Posts: 1,666
You can use this method - i strongly disagree with their approach to PCB tin plating but this method will work nicely for rusty Amiga shield - remove rust mechanically to clean metal (sanding paper? steel wool?), apply tin paste with firm brush (should be stiff so you can apply very thin layer of tin flux). Then use hot air gun to melt tin - you should be able to restore original look and function (as shield is made from tin plated steel).

[ Show youtube player ]
pandy71 is offline  
Old 02 February 2019, 02:22   #4
solarmon
Registered User

 
Join Date: Dec 2018
Location: UK
Posts: 122
Thanks for the tips.

The plumbers paste method is an interesting one, but I think it won't be practical for the whole of the shielding?

I might just try the sanding down, then use the primer and silver spray paint method.

I wish somebody would do a whole bottom shield replacement - like this blanking plate:

https://centuriontech.eu/product/a12...shield-blank/:

Cheers!
solarmon is online now  
Old 02 February 2019, 14:02   #5
deladrevoc
Not enough time

deladrevoc's Avatar
 
Join Date: Dec 2014
Location: England
Posts: 26
Don't forget the insulation layer when you reassemble …

https://amigakit.amiga.store/product...roducts_id=611
deladrevoc is offline  
Old 03 February 2019, 00:43   #6
Predseda
Puttymoon inhabitant
Predseda's Avatar
 
Join Date: Mar 2007
Location: The City of Townsville
Age: 41
Posts: 5,194
Amiga needs the lower shielding, because all the rear ports are attached to it. Thats all.
Predseda is offline  
Old 03 February 2019, 01:46   #7
solarmon
Registered User

 
Join Date: Dec 2018
Location: UK
Posts: 122
Quote:
Originally Posted by deladrevoc View Post
Don't forget the insulation layer when you reassemble …

https://amigakit.amiga.store/product...roducts_id=611
Yeah, I thought the one in my Amiga 1200 was a gonna with all that rust mark on it. However, after a bit of elbow grease, all the rust marks came off nicely and it was OK to use.

That saved me £3.60!
solarmon is online now  
Old 09 February 2019, 15:48   #8
solarmon
Registered User

 
Join Date: Dec 2018
Location: UK
Posts: 122
I got some sandpaper (No. 120) and removed as much as I could by hand.

See before and after shots. The most amazing thing is that I only managed to get 1 cut from the process!

I'm happy with the result so far, but might use a rotary tool to get at the tight corners and edges.

I got some DECOCOLOR RUST BLOCKER 4in1 ANTICORROSIVE METAL ANTIRUST HOME GARDEN SPRAY PAINT from eBay:

https://www.ebay.co.uk/itm/DECOCOLOR...72.m2749.l2649

I'm still considering whether to use this or not. I'll test it out on the small bit of shielding that covers the memory (?) chip and see how that turns out.
Attached Thumbnails
Click image for larger version

Name:	IMG_20190208_223647.jpg
Views:	25
Size:	341.7 KB
ID:	62003   Click image for larger version

Name:	IMG_20190208_223909.jpg
Views:	25
Size:	347.3 KB
ID:	62004   Click image for larger version

Name:	IMG_20190209_132448.jpg
Views:	30
Size:	726.4 KB
ID:	62005   Click image for larger version

Name:	IMG_20190209_132541.jpg
Views:	26
Size:	634.9 KB
ID:	62006  

Last edited by solarmon; 09 February 2019 at 20:14.
solarmon is online now  
Old 09 February 2019, 19:28   #9
zipper
Registered User
 
Join Date: Mar 2004
Location: finland
Posts: 1,496

Something like this, based on phosphoric acid
zipper is offline  
Old 09 February 2019, 20:01   #10
Mick
Registered User

 
Join Date: Jan 2004
Location: Yorkshire
Posts: 297
I was going to recommend the centuriontech.eu backplates, they're quality. I doubt EMF interference is as big an issue these days so all the shielding really does is give support to the motherboard connectors and in the case of older motherboard revisions hold the mouse port - the centuriontech backplates do both perfectly. In fact if they're reading they should make some for A500 motherboards since new cases are released soon.
Mick is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
68k Rust Locutus Coders. Language 5 18 March 2019 20:01
Amiga 600 RF shield rust/oxidation question superrune support.Hardware 15 10 October 2018 13:49
Exceptions dealing with files nandius_c Coders. Asm / Hardware 4 29 October 2017 22:05
FAO people dealing with DoogUK Xytec MarketPlace 11 28 July 2009 14:05
Diamonds & Rust ?? mai HOL contributions 10 26 September 2008 07:37

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 10:00.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Page generated in 0.07562 seconds with 14 queries