Comparing intergranular corrosion in Al-Mg-Si-Cu alloys with and without α-Al(Fe,Mn,Cu)Si particles

被引：9

作者：

Lervik, Adrian ^{[1
]}

Danbolt, Turid ^{[2
]}

Furu, Trond ^{[2
,3
]}

Holmestad, Randi ^{[1
]}

Lunder, Otto ^{[2
,4
]}

机构：

[1] Norwegian Univ Sci & Technol NTNU, Dept Phys, N-7491 Trondheim, Norway

[2] Norwegian Univ Sci & Technol NTNU, Dept Mat Sci & Engn, Trondheim, Norway

[3] Norsk Hydro ASA, Oslo, Norway

[4] SINTEF Ind, Trondheim, Norway

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2021年 / 72卷 / 03期

关键词：

aluminium alloys; electron microscopy; grain boundaries; intergranular corrosion; microstructure; INTERMETALLIC PHASES; ALUMINUM-ALLOYS; COPPER CONTENT; AGING CONDITIONS; HEAT-TREATMENT; IN-SITU; PRECIPITATION; BEHAVIOR; MODEL; MICROSTRUCTURE;

D O I：

10.1002/maco.202011954

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, a model alloy without Fe and Mn additions, is compared with a commercial AA6005 alloy to further understand how the alpha-Al(Fe,Mn,Cu)Si particles affect intergranular corrosion (IGC) behaviour. Both alloys were subjected to an accelerated IGC test for durations ranging from 1 to 120 h. Microstructures were studied using scanning and transmission electron microscopy, and electron backscatter diffraction. The presence of alpha-Al(Fe,Mn,Cu)Si particles yields significantly more uniform IGC attacks and higher corrosion rates. However, the maximum depth of IGC attacks reaches similar values after similar to 24 h of exposure. This is attributed to the formation of Cu-rich particles along the grain boundaries during the corrosion process, which further catalyses the cathodic reactions.

引用

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页码：575 / 584

页数：10

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