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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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CA accelerator discoloration
I am gluing some copper to wood with CA. Anyone knows how to get rid
of the white/blue/green discoloration that develops with an accelerator? It disappears when washed with 99% isopropanol or acetone but reappears after drying. I understand that there may be a way to avoid getting the white stuff by not using so much of the accelerator but is there any way to get rid of it *after* the fact? Michael Koblic, Campbell River, BC |
#2
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CA accelerator discoloration
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#3
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CA accelerator discoloration
On Thu, 06 Dec 2012 23:19:14 -0500, "Michael A. Terrell"
wrote: wrote: I am gluing some copper to wood with CA. Anyone knows how to get rid of the white/blue/green discoloration that develops with an accelerator? It disappears when washed with 99% isopropanol or acetone but reappears after drying. I understand that there may be a way to avoid getting the white stuff by not using so much of the accelerator but is there any way to get rid of it *after* the fact? Metal polish? Polishing compound? Salt + lemon juice cleans it, but MAAS metal polish cleans and protects from oxidizing again. Try that. About $5 for a tube not much larger than your thumb, but it goes a long way. Works on most metals. I've had luck with copper, brass, silver plate, aluminum (I think), and stainless steel. -- ....in order that a man may be happy, it is necessary that he should not only be capable of his work, but a good judge of his work. -- John Ruskin |
#4
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CA accelerator discoloration
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#5
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CA accelerator discoloration
On Thu, 06 Dec 2012 23:59:23 -0600, Richard
wrote: On 12/6/2012 9:00 PM, wrote: I am gluing some copper to wood with CA. Anyone knows how to get rid of the white/blue/green discoloration that develops with an accelerator? It disappears when washed with 99% isopropanol or acetone but reappears after drying. I understand that there may be a way to avoid getting the white stuff by not using so much of the accelerator but is there any way to get rid of it *after* the fact? Michael Koblic, Campbell River, BC Yeah, don't use the accelerator. What he said. Accelerator active ingredient is N,N-dimethyl p-toluidene, a tertiary amine. Amines react with copper to form quaternary amine complexes. In other words, they eat copper. Pete Keillor |
#6
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CA accelerator discoloration
On Fri, 07 Dec 2012 06:15:54 -0600, Pete Keillor wrote:
On Thu, 06 Dec 2012 23:59:23 -0600, Richard wrote: On 12/6/2012 9:00 PM, wrote: I am gluing some copper to wood with CA. Anyone knows how to get rid of the white/blue/green discoloration that develops with an accelerator? It disappears when washed with 99% isopropanol or acetone but reappears after drying. I understand that there may be a way to avoid getting the white stuff by not using so much of the accelerator but is there any way to get rid of it *after* the fact? Michael Koblic, Campbell River, BC Yeah, don't use the accelerator. What he said. Accelerator active ingredient is N,N-dimethyl p-toluidene, a tertiary amine. Amines react with copper to form quaternary amine complexes. In other words, they eat copper. Pete Keillor Or at least go at it knowing that you're going to need to use a polishing compound that's going to actually remove the material. I wouldn't expect a CA to wood bond to be secure in the long run. If you need strength, I think epoxy would be better, or maybe contact cement. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com |
#7
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CA accelerator discoloration
On Dec 7, 12:17*pm, Tim Wescott wrote:
On Fri, 07 Dec 2012 06:15:54 -0600, Pete Keillor wrote: On Thu, 06 Dec 2012 23:59:23 -0600, Richard wrote: On 12/6/2012 9:00 PM, wrote: I am gluing some copper to wood with CA. Anyone knows how to get rid of the white/blue/green discoloration that develops with an accelerator? It disappears when washed with 99% isopropanol or acetone but reappears after drying. I understand that there may be a way to avoid getting the white stuff by not using so much of the accelerator but is there any way to get rid of it *after* the fact? Michael Koblic, Campbell River, BC Yeah, don't use the accelerator. What he said. *Accelerator active ingredient is N,N-dimethyl p-toluidene, a tertiary amine. *Amines react with copper to form quaternary amine complexes. *In other words, they eat copper. Pete Keillor Or at least go at it knowing that you're going to need to use a polishing compound that's going to actually remove the material. I wouldn't expect a CA to wood bond to be secure in the long run. *If you need strength, I think epoxy would be better, or maybe contact cement. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Softwarehttp://www.wescottdesign.com- Hide quoted text - - Show quoted text - I'd use a silicone adhesive(or screws). Wood moves, copper doesn't, a rigid bond is going to shear. Copper isn't going to stay shiny unless you coat it with lacquer or wax. Stan |
#8
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CA accelerator discoloration
On 12/7/2012 2:10 PM, Stanley Schaefer wrote:
On Dec 7, 12:17 pm, Tim wrote: On Fri, 07 Dec 2012 06:15:54 -0600, Pete Keillor wrote: On Thu, 06 Dec 2012 23:59:23 -0600, wrote: On 12/6/2012 9:00 PM, wrote: I am gluing some copper to wood with CA. Anyone knows how to get rid of the white/blue/green discoloration that develops with an accelerator? It disappears when washed with 99% isopropanol or acetone but reappears after drying. I understand that there may be a way to avoid getting the white stuff by not using so much of the accelerator but is there any way to get rid of it *after* the fact? Michael Koblic, Campbell River, BC Yeah, don't use the accelerator. What he said. Accelerator active ingredient is N,N-dimethyl p-toluidene, a tertiary amine. Amines react with copper to form quaternary amine complexes. In other words, they eat copper. Pete Keillor Or at least go at it knowing that you're going to need to use a polishing compound that's going to actually remove the material. I wouldn't expect a CA to wood bond to be secure in the long run. If you need strength, I think epoxy would be better, or maybe contact cement. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits& Softwarehttp://www.wescottdesign.com- Hide quoted text - - Show quoted text - I'd use a silicone adhesive(or screws). Wood moves, copper doesn't, a rigid bond is going to shear. Copper isn't going to stay shiny unless you coat it with lacquer or wax. Stan Which is why I keep recommending any of the many flavors of Goop. Good strong flexible bond, cheap, easy cleanup. For a job like this, Plumbers Goop - very low viscosity will make for a smooth thin film. Excellent bond. |
#9
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CA accelerator discoloration
On Fri, 07 Dec 2012 14:48:26 -0600, Richard
wrote: [...] Which is why I keep recommending any of the many flavors of Goop. Good strong flexible bond, cheap, easy cleanup. For a job like this, Plumbers Goop - very low viscosity will make for a smooth thin film. Excellent bond. It would have been my first choice but not feasible in this application. The same reason why accelerator was desirable. I changed the way I apply the accelerator and I no longer see the discoloration and get a secure bond quickly. Problem solved. Michael Koblic, Campbell River, BC |
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