Corrosion behavior of friction stir welded ALMgMn alloy

Radović, Ljubica; Radisavljević, Igor; Bučko, Mihael

doi:10.5937/zzk1704161r

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2020

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“…Although Al-Mg alloys are considered to have good corrosion resistance, Al-Mg alloys with (5-6) %Mg under certain manufacturing and service conditions may be prone to IGC and (SCC) [12,[30][31]. Additionally, corrosion resistivity of weld of these alloys, due to microstructural changes caused by filler (usually AlMg5) and weld thermal cycle, among other factors, is dependent on electrochemical properties of welding zones [6,32].…”

Section: Discussionmentioning

confidence: 99%

Effect of sensitization on corrosion properties of TIG welded Al-Mg alloy

Radović¹,

Marinković²

2020

Sci Tech Rev

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The effect of sensitization on the intergranular corrosion (IGC) of TIG welded AlMg6Mn was investigated by means of scanning electron microscopy (SEM) and corrosion NAMLT tests. The as-received hot rolled AlMg6Mn alloy plates with a thickness of 8 mm were welded by TIG welding with S-AlMg5 as a filler material. Specimens were sensitized at 100°C for 7 days. It was found that welded specimens are sensitive to IGC. The. mass loss in NAML test was 106.7 mg/cm². The welding increases the susceptibility to IGC, since the mass loss of the base metal at the same test was 70.7 mg/cm². The increase of susceptibility to IGC is attributed to significant continually precipitated Mg-rich phase along the grain boundaries during the sensitization treatment.

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Section: Discussionmentioning

confidence: 99%