INTRODUCTION TO MMA WELDING AND ITS APPLICATIONS.
Manualmetalarcwelding(MMA),alsoknownas shieldedmetalarcwelding(SMAW),isapopular techniqueusedformanyyearsacrossvarious industries.Itinvolvesjoiningtwometalpieces usinganelectricarcandaconsumableelectrode coveredinflux.
MMAweldingisfrequentlyemployedintheconstruction, shipbuilding,andpipelinefabricationindustries.Inaddition, itisbeneficialforweldingmaterialsthataredifficulttoweld usingotherweldingtechniques,suchascastiron,stainless steel,andcarbonsteel.
MMAweldingbeginsbyconnectingtheelectrodeholderto thepowersourceandselectingtheappropriateelectrode basedonthetypeofmetalbeingwelded.
Theelectrodeisinsertedintotheholder,andthewelding circuitiscompletedbyhittinganarcbetweenthearticleand theelectrode.
Asthearcheatsup,theelectrodemeltsanddepositsfiller metalontotheworkpiece.Atthesametime,thefluxcovering theelectrodecreatesashieldaroundtheweldpool, protectingitfromcontaminantsintheairandpreventing oxidation.