Corrosion Behavior of TIG Welded AlMg6Mn Alloy

 

Ljubica Radović

Mihail Bučk

Marko Miladinov

 

The influence of TIG welding on the corrosion and mechanical properties of AlMg6Mn was investigated. The as-received hot rolled AlMg6Mn alloy plates (AR) with a thickness of 8 mm were welded by TIG welding with S-AlMg5 as a filler material. The microstructure, mechanical properties and corrosion behavior of the weld joint filled with AlMg5 welding wires, were studied by optical microscopy, scanning electron microscopy, hardness testing and corrosion NAMLT and ASSET tests. 
It was found that AR is more susceptible to intergranular corrosion than TIG welding specimens, while neither AR nor TIG specimens showed susceptibility to exfoliation corrosion

 

Key words: alloys, Al-Mg-Mn alloys, welding, TIG welding, welded joint, corrosion, intergranular corrosion, mechanical properties.