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Steve M.
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4Gears4Tires
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 Posted: Sat Jan 11, 2020 8:35 am Post subject: Re: 091/1 output flange refurb - Speedi Sleeve |
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A vendor through home depot. They are trying to make their online store a market place like Amazon.
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'87 Syncro Ferric Oxyhydroxide Superleggera Edition
'85 Westy Sciuridae Domus Edition |
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DanHoug
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| Posted: Sat Jan 11, 2020 10:34 am Post subject: Re: 091/1 output flange refurb - Speedi Sleeve |
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| tencentlife wrote: |
The surface activator is by no means "required", their own literature says so. The PDS says it's mainly a "basic copper salt", so it's likely similar to a soldering flux, it reacts to draw out and neutralise impurities, cleaning the surfaces to allow deeper adhesion of the product. |
seeing it was a copper salt, made me curious to do the Google... an activator looks useful in some situations. Of course we've all snotted something up without it but i might get a tube to have on hand for critical (read: I rilly rilly hope this works) spots. note that "passive metals" are those which form an oxide film eg aluminum.
"LOCTITE® SF 7090 is a dark blue-green, low viscosity, reactive monomer-based, solvent-free surface activator composed of copper salt and aliphatic amine which increases the cure speed of LOCTITE anaerobic products. It is especially recommended for applications with passive metals or inert surfaces, with large bond gaps or where prevailing temperatures are as low as <+59 °F (<+15 °C)."
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60% of what you find on the internet is wrong, including this post.
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tencentlife
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| Posted: Sat Jan 11, 2020 11:28 am Post subject: Re: 091/1 output flange refurb - Speedi Sleeve |
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| Quote: |
note that "passive metals" are those which form an oxide film eg aluminum.
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I didn't even read that far, but it makes sense, aluminum passivates an oxide layer so fast it's nearly impossible to work with the unoxidised metal without extra measures, like flux.
No chemistry knowledge here, but I presume it works somewhat like soldering/brazing fluxes. Here's a bit from Wikipedia which might point to similarities:
https://en.wikipedia.org/wiki/Flux_(metallurgy)
Composition and properties
Organic fluxes typically consist of four major components:
Activators - chemicals disrupting/dissolving the metal oxides. Their role is to expose unoxidized, easily wettable metal surface and aid soldering by other means, e.g. by exchange reactions with the base metals.
Highly active fluxes contain chemicals that are corrosive at room temperature. The compounds used include metal halides (most often zinc chloride or ammonium chloride), hydrochloric acid, phosphoric acid, citric acid, and hydrobromic acid. Salts of mineral acids with amines are also used as aggressive activators.
Hmmm, HDAP, your newest FLAPS. Whoulda thunk?
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Butcher
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| Posted: Sun Jan 12, 2020 8:02 am Post subject: Re: 091/1 output flange refurb - Speedi Sleeve |
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| What if Home Depot focused on making their Hardware store better before branching out and ruining another industry? |
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Gnarlodious 
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