[Gasification] vehicle conversion at weekend gasification workshop in bay area, california

[Thomas Reed]

Dear All:

The name for commercial hydrochloric acid is "muriatic acid" and it is 
available at our local hardware store and presumably most other stores.

TOM REED

Kevin Chisholm wrote:
> Dear Jeff
>
> Any HCl will work... dilute acid is slower, takes longer, and you need 
> more of it.
>
> Note also that the zinc associated with Galvanized Iron is in two forms:
> 1: Free zinc on the surface of the metal. This comes off relatively 
> easy, because of its reactivity. Zinc plated goods have only "free zinc."
> 2: Intermetallic zinc, a zinc compound, Fe3Zn (?) The zinc has formed a 
> compound with the underlying iron. It is necessary to corrode away the 
> iron associated with the Fe3Zn(?) in order to get out all the Zn.
>
> So, if you "acid dip" a part with zinc on it, you can easily remove the 
> zinc from zinc plated iron, but it is a lot more difficult to eliminate 
> the zinc from galvanized iron.
>
> Best wishes,
>
> Kevin
>
>
>
>
> Jeff Davis wrote:
>   
>> Thanks for all the info... I'm glad that I didn't e-mail Tom to have me
>> removed from this list! I learn so much here...
>>
>> Can hydrochloric acid be purchased at a welders supply house and does it
>> need to be 100% pure or will something like 10% work?
>>
>>
>>
>> Always learning,
>>
>> Jeff
>>
>>
>>
>>     
>>> Please neutralize the de-galvanized metal in a baking soda solution
>>> followed
>>> by a fresh water rinse prior to welding.
>>>
>>>
>>> Jeff Davis wrote:
>>>       
>>>> Dear Jim,
>>>>
>>>> Please tell us more about how to use acid to remove the galvanizing.
>>>>
>>>>
>>>> Jeff
>>>>
>>>>
>>>>         
>>> Stick the galvanised thing into hydrochloric acid (also known as
>>> Muriatic Acid). H2 will be evolved and eventually all the galvanising
>>> will be gone. if you keep adding zinc to the remaining liquid till it
>>> stops gassing you can use the remaining liquid as soldering flux. This
>>> comes from the plumbing trade. HCL available at hardware shops. Ready
>>> made soldering fluid used to (may still) be sold in Australia as
>>> "Baker's Soldering Fluid" (Bakers???).
>>>
>>> Use the usual care around the acid.
>>>
>>> Kurt
>>>
>>> _______________________________________________
>>> Gasification mailing list
>>> Gasification at listserv.repp.org
>>> http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
>>> http://gasifiers.bioenergylists.org
>>>
>>>
>>>       
>>     
>
>
> _______________________________________________
> Gasification mailing list
> Gasification at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
> http://gasifiers.bioenergylists.org
>
>
>