 | Home > Maintenance & Modifications > Duralac or ACF50 Corrosion Block ? |
 
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| discomog Member Since: 09 May 2015 Location: Notts/Lincs Border Posts: 2526   
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Whilst you're considering Duralac as an alternative to ACF50, I would also consider Tefgel. Both Duralac and Tefgel have been used in the boat industry for years particularly where aluminium parts, such as masts and booms are used with stainless steel fittings. Tefgel seems to be more expensive but Tefgel is not quite as messy as Duralac and doesn't set hard like Duralac.
Tefgel seems to work better with close fitting joints and Duralac with more loose, gappy joints. I favour Tefgel for fittings on the Defender. Defender 90XS SW Mini Countryman Cooper S Morgan Plus 8 |
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23rd Dec 2018 9:22am |
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| Greg4427 Member Since: 18 Mar 2016 Location: Melbourne Posts: 52  
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I spray my Daisy, Defender 90, every six months everywhere with ACF50 and haven’t had any problems as yet. Admittedly, we don’t have the corrosion problems with our vehicles that occur in Europe.
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23rd Dec 2018 9:43am |
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| leeds Member Since: 28 Dec 2009 Location: West Yorkshire Posts: 8580
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There are several products in the market place with anti corrosion properties, anti stick properties, or combination of both properties.
Anti corrosion properties is required when two differing metals are in contact and they are in different places on the galvanic table. Throw in water especially salt water ( close to sea or winter time with salt grit on the road) and have an electrolyte and potential galvanic cell. Duralac has anti corrosion properties and will harden with exposure to air. ACF 50 I believe was designed for the military as an anti corrosion spray, as a spray it is good for large areas such as rear cross members (which reminds me must do ours). Use of plastic washers or thin rubber gaskets can also help. Using stainless steel nuts and bolts there can be the issue of cold welding or galling of the stainless steel. Duralac has no anti seize properties. The paste supplied by Nakatanenga with their stainless bolt kits have both anti seize and anti corrosion properties. This paste is non drying. Like many things it is a case of picking the right tool for the job in hand. Brendan |
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23rd Dec 2018 10:18am |
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| discomog Member Since: 09 May 2015 Location: Notts/Lincs Border Posts: 2526
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If you are using stainless threaded fasteners then you need to prevent or reduce galling between the nut and the bolt. If you are using stainless fasteners which come into contact with dissimilar metals then you also need a product that will prevent galvanic corrosion as well as galling. If you are using stainless washers and they come into contact with dissimilar metals then you will need a product that will prevent galvanic corrosion. Defender 90XS SW
Mini Countryman Cooper S Morgan Plus 8 |
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23rd Dec 2018 11:22am |
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| Romadog Member Since: 07 Jul 2011 Location: Powys Posts: 1749 |
A good dose of copper slip then
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23rd Dec 2018 2:29pm |
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| leeds Member Since: 28 Dec 2009 Location: West Yorkshire Posts: 8580
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Copperslip is good as a lubricant but is also a good electrical conductor.
Pick the paste to do the job required. Brendan |
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23rd Dec 2018 2:41pm |
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| MJN110 Member Since: 18 May 2015 Location: North Yorkshire Posts: 380 
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Just for clarity gents when I was referring to ACF50 i meant the grease not the spray.
I do use the spray as well on screw heads underneath cappings and the rear cross member. Thanks 2016 Defender Landmark 90 2005 Defender CSW TD5 90XS |
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23rd Dec 2018 3:20pm |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1314 
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I'm going back many years now, but a friend of mine did a nut & bolt restoration on his Lightweight, including fabricating many of the panels from scratch.
He used Denso Paste as a barrier between all dissimilar metals. Many years later, there was no obvious sign of any electrolytic corrosion around the fasteners, or where steel had been bolted to ali. No idea if it was the right stuff for the job, but the results were impressive. |
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23rd Dec 2018 3:35pm |
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| Kev1969 Member Since: 17 Nov 2017 Location: Shropshire Posts: 5 
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Duralac for me ,a bit messy but well used in the marine industry and boat building industry. A tube goes a long way .
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23rd Dec 2018 7:33pm |
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