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Re: [MW:33014] Black soot in MIG

By Materials & Welding

seems to be like Aluminium alloy with slight additions of Zn, Mg & Cu mostly in Aerospace industries,

Thanks & Regards

J.Gerald Jayakumar



On Friday, 1 April, 2022, 09:26:43 am IST, Anthony Dalisay <anthonydalisay6@gmail.com> wrote:


Filler wire is ER70-6S @0.8 diameter size. 

On Fri, 1 Apr 2022 at 11:45 AM Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:
what is welding rod classification

THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE,  CSWIP 3.1,
ISO 9712 Level 2 in VT,
ASNT-Level II in PT,MT,RT & UT,
LA ISO 9001-2015,
International Welding Engineer. 
CONSULTANT-WELDING & QUALITY
Mobile no: +919940739349


On Thu, Mar 31, 2022 at 3:36 PM 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:
Try AC current

Thanks & Regards

J.Gerald Jayakumar




On Thursday, 31 March, 2022, 01:03:59 pm IST, Anthony Dalisay <anthonydalisay6@gmail.com> wrote:


Dear experts,

We have been welding aluminized sheet using MIG welder with the following parameters:

Amps: 125
Volts: 29.5
TS: 50cm/min
Gas flow rate: 12L/min
Gas type : 18%CO2 and 82%Ar

However, I cant get rid of black soot (smoke) in the weld vicinity. What do you think, is the best way to do to achieve cleaner weld in aluminized sheet such as this? 

Refer to attached photo for reference.



Thanks in advance for your expert advice.

Regards,
Anthony
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TWI AWeldI

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