Re: [MW:33014] Black soot in MIG

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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