General Duralac anti-corrosion compound - Revision history

HarryMann at 08:32, 23 April 2009

2009-04-23T08:32:46Z

← Older revision		Revision as of 08:32, 23 April 2009
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	'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion		'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion

	If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing ~~compund~~, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. Duralac (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.		If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing compound, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. Duralac (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.

	Duralac or JC5A is also ideal when jointing up timber and steel/ally, say when using bolts or rivets, or permanently planking a steel deck with ply.		Duralac or JC5A is also ideal when jointing up timber and steel/ally, say when using bolts or rivets, or permanently planking a steel deck with ply.
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	[[Image:IMG_2833(800x600).jpg]]		[[Image:IMG_2833(800x600).jpg]]

	Serious ~~bimetallic~~ corrosion example - Steel mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick		Serious bi-metallic corrosion example - Steel mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick

	Duralac or JC5A would minimise this type of corrosion eating into the alloy transaxle case.		Duralac or JC5A would minimise this type of corrosion eating into the alloy transaxle case.

	[[Image:BM_CORROSION_01.jpg]]		[[Image:BM_CORROSION_01.jpg]]

HarryMann at 18:25, 25 October 2008

2008-10-25T18:25:40Z

← Older revision		Revision as of 18:25, 25 October 2008
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	Duralac: ''Inhibits electrolytic corrosion between dissimilar metals''		Duralac: ''Inhibits electrolytic corrosion between dissimilar metals''

	Get Duralac (surprisingly cheap) or JC5A (Great stuff but ~~suprisingly~~ expensive) at aircraft sundry suppliers, : [http://www.lasaero.com/las/55?id=11 lasaero.com]		Get Duralac (surprisingly cheap) or JC5A (Great stuff but surprisingly expensive) at aircraft sundry suppliers, : [http://www.lasaero.com/las/55?id=11 lasaero.com]

HarryMann at 18:24, 25 October 2008

2008-10-25T18:24:01Z

← Older revision		Revision as of 18:24, 25 October 2008
Line 10:		Line 10:
	Duralac: ''Inhibits electrolytic corrosion between dissimilar metals''		Duralac: ''Inhibits electrolytic corrosion between dissimilar metals''

	Get Duralac or JC5A at aircraft sundry suppliers, ~~surpisingly cheap~~: [http://www.lasaero.com/las/55?id=11 lasaero.com]		Get Duralac (surprisingly cheap) or JC5A (Great stuff but suprisingly expensive) at aircraft sundry suppliers, : [http://www.lasaero.com/las/55?id=11 lasaero.com]

HarryMann at 18:22, 25 October 2008

2008-10-25T18:22:31Z

← Older revision		Revision as of 18:22, 25 October 2008
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	Today, many would use Copper Grease, as that is more likely to be to hand and can work well for a while, but which can't fill such voids as well, between faces or bolts and their holes. Silcone and polyester sealants are also now available in a much wider range (e.g. RTV types), though 'stick or seal' is their main application.		Today, many would use Copper Grease, as that is more likely to be to hand and can work well for a while, but which can't fill such voids as well, between faces or bolts and their holes. Silcone and polyester sealants are also now available in a much wider range (e.g. RTV types), though 'stick or seal' is their main application.

	Get Duralac or JC5A at ~~aircarft~~ sundry suppliers:
	[http://www.lasaero.com/las/55?id=11 lasaero.com]		Duralac: ''Inhibits electrolytic corrosion between dissimilar metals''

			Get Duralac or JC5A at aircraft sundry suppliers, surpisingly cheap: [http://www.lasaero.com/las/55?id=11 lasaero.com]

HarryMann at 18:17, 25 October 2008

2008-10-25T18:17:14Z

← Older revision		Revision as of 18:17, 25 October 2008
Line 1:		Line 1:
	'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion		'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion

	If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing compund, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. ~~Durualac~~ (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.		If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing compund, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. Duralac (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.

	Duralac or JC5A is also ideal when jointing up timber and steel/ally, say when using bolts or rivets, or permanently planking a steel deck with ply.		Duralac or JC5A is also ideal when jointing up timber and steel/ally, say when using bolts or rivets, or permanently planking a steel deck with ply.

HarryMann at 02:13, 15 February 2007

2007-02-15T02:13:15Z

← Older revision		Revision as of 02:13, 15 February 2007
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	Serious bimetallic corrosion example - Steel mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick		Serious bimetallic corrosion example - Steel mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick

			Duralac or JC5A would minimise this type of corrosion eating into the alloy transaxle case.

	[[Image:BM_CORROSION_01.jpg]]		[[Image:BM_CORROSION_01.jpg]]

HarryMann at 01:55, 15 February 2007

2007-02-15T01:55:22Z

← Older revision		Revision as of 01:55, 15 February 2007
Line 1:		Line 1:
	'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion		'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion

	~~http://www.lasaero.com/las/55?id=11~~

	If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing compund, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. Durualac (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.		If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing compund, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. Durualac (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.
Line 8:		Line 6:

	Today, many would use Copper Grease, as that is more likely to be to hand and can work well for a while, but which can't fill such voids as well, between faces or bolts and their holes. Silcone and polyester sealants are also now available in a much wider range (e.g. RTV types), though 'stick or seal' is their main application.		Today, many would use Copper Grease, as that is more likely to be to hand and can work well for a while, but which can't fill such voids as well, between faces or bolts and their holes. Silcone and polyester sealants are also now available in a much wider range (e.g. RTV types), though 'stick or seal' is their main application.

			Get Duralac or JC5A at aircarft sundry suppliers:
			[http://www.lasaero.com/las/55?id=11 lasaero.com]


	[[Image:IMG_2833(800x600).jpg]]		[[Image:IMG_2833(800x600).jpg]]

	Serious bimetallic corrosion example - ~~Stel~~ mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick		Serious bimetallic corrosion example - Steel mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick

	[[Image:BM_CORROSION_01.jpg]]		[[Image:BM_CORROSION_01.jpg]]

HarryMann at 01:53, 15 February 2007

2007-02-15T01:53:34Z

← Older revision		Revision as of 01:53, 15 February 2007
Line 11:		Line 11:

	[[Image:IMG_2833(800x600).jpg]]		[[Image:IMG_2833(800x600).jpg]]

			Serious bimetallic corrosion example - Stel mounting plate to end of T25 transaxle - ''slate'' chips were 1/8" thick

	[[Image:BM_CORROSION_01.jpg]]		[[Image:BM_CORROSION_01.jpg]]

HarryMann at 01:50, 15 February 2007

2007-02-15T01:50:43Z

← Older revision		Revision as of 01:50, 15 February 2007
Line 11:		Line 11:

	[[Image:IMG_2833(800x600).jpg]]		[[Image:IMG_2833(800x600).jpg]]

			[[Image:BM_CORROSION_01.jpg]]

WikiSysop at 22:26, 10 July 2006

2006-07-10T22:26:19Z

New page

'''HarryMann:''' Jointing compound - Corrosion prevention - bi-metallic corrosion

http://www.lasaero.com/las/55?id=11

If you've ever removed the rear-hub from the radius-arm on a T25, you may have noticed a yellow or off-white dried-up paste that VW used between the two during assembly. This is a chromate jointing compund, to keep moisture out, separating the faces and preventing corrosion. It is particularly used when dissimilar metals are joined together, steel bolts in ally castings for instance, or large slightly uneven faces with voids brought into contact. Used a lot in the aircraft industry, Duralac is a trade name for the cheaper version normally used; a higher spec. for chromate compound is JC5A which doesn't dry and remains a paste indefinitely. Durualac (below) can be obtained fairly easily and cheaply, JC5A costs 5~10 times as much.

Duralac or JC5A is also ideal when jointing up timber and steel/ally, say when using bolts or rivets, or permanently planking a steel deck with ply.

Today, many would use Copper Grease, as that is more likely to be to hand and can work well for a while, but which can't fill such voids as well, between faces or bolts and their holes. Silcone and polyester sealants are also now available in a much wider range (e.g. RTV types), though 'stick or seal' is their main application.

[[Image:IMG_2833(800x600).jpg]]