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Event Type
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Storage Facilities
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Description
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Assistance from Senson Technology - Corrosion Protection
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Participants
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5 Manhours - Richard Martyn, Tony Epton
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Date
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2004-Jan
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Click on this thumbnail to see a larger image
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Senson Technology Pty Ltd | 
Aquaguard (cleaner) | 
Ferroguard (surface coat protection) |
Higuard (Surface Protection in enclosed spaces) | 
Kleenguard (Cleans and Protects circuit boards) | 
1a..Corroded Surface before cleaning |
1b..Corroded Surface after experiments | 
2a..Nicad Battery holder before treatment | 
2b..After Cleaning |
3a..Before treatment | 
3b..After Cleaning | 
3b..After Coating with Ferroguard |
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See Also Event(s)
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Storage Facilities - Cabinet Cleaning
Acquisitions - Hardware Donations from Richard Martyn
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Comments
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I met with Richard Martyn of Senson Technology
Richard very generously gave his time to explain to me various barrier treatments for the prevention of corrosion on metal surfaces and printed circuit boards.
Even more generously, he donated many hundreds of dollars worth of chemicals to assist the museum in treating the present corrosion problems.
The Senson products deal with many different corrosion situations.
I will describe only how we will use these products in our particular situation
(excessive mousture in the barn and condensation)
Please refer to numbered photographs above
1a..The surface was covered in extensive white blisters
1b..This is very UNREPRESENTATIVE.
I have done a number of experiments with a number of chemicals on this panel.
First I scrubbed the surface vigorously with a 1:2 solution of Aquaguard. This removed all the surface blister. Small craters (as to be expected) became visible in the metal surface.
Next I tried some (unrelated to Senson) experiments to see if I could change the appearance of the pitting.
35% phosphoric acid certainly removed any red rust appearance from the pits, but changed the entire test area to blue, not just the corrosion (left hand edge in photo)
Next I tried vigorous rubbing with Brasso - this certainly reduced the appearance of the pits - due probably to the fine abrasives in the paste. However it also removed the surface coating of the metal - changing it from a yellowish appearance to a silver colour (slightly more towards the centre of the photo)
The entire metal surface was then coated twice with Ferroguard - this gives it quite an attractive sheen and will stop further corrosion in the craters.
The damage from the corrosion is still visible through this coating but the cosmetic appearance has markedly improved (look towards the right hand edge of the photograph where the surface has been treated with Senson products only)
Compare the treated panel to the untreated panel in the top part of the photograph.
I think the lesson here is to just use the Aquaguard to scrub off as much of the corrosion as possible, then use the Ferroguard to seal it. Don't muck around with any other products.
2a...Battery holder damaged by fumes from Nicad
2b..After cleaning with Aquaguard
3b..After coating with Ferroguard (rather inexpertly) - the appearance of the remaining corrosion is significantly reduced
I also discussed with Richard, the
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