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- W3209627189 abstract "Al-based alloys named M1, M2, M3, M4, and M5 doped with different atomic percentage (at%) of cobalt and manganese as cast and submitted at two heat treatments (600°C and 1100°C) were analyzed by using electrochemical techniques to evaluate their corrosion resistance immersed in 3 M KOH. With the heat treatments applied to the alloys, the sample M2 (65% Al, 20% Co, and 15% Mn) observed the highest corrosion resistance with <math xmlns=http://www.w3.org/1998/Math/MathML id=M1> <msub> <mrow> <mi>R</mi> </mrow> <mrow> <mi>p</mi> </mrow> </msub> </math> values of <math xmlns=http://www.w3.org/1998/Math/MathML id=M2> <mn>3.0</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </math> , <math xmlns=http://www.w3.org/1998/Math/MathML id=M3> <mn>6.2</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </math> , and <math xmlns=http://www.w3.org/1998/Math/MathML id=M4> <mn>1.61</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>3</mn> </mrow> </msup> <mtext> </mtext> <mi>Ω</mi> <mo>·</mo> <mtext>c</mtext> <msup> <mrow> <mtext>m</mtext> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </math> as cast, 600°C, and 1100°C, respectively. The latter was in agreement with the <math xmlns=http://www.w3.org/1998/Math/MathML id=M5> <msub> <mrow> <mi>I</mi> </mrow> <mrow> <mtext>corr</mtext> </mrow> </msub> </math> calculated from the polarization curves where the values decrease based on the heat treatment applied as follows: <math xmlns=http://www.w3.org/1998/Math/MathML id=M6> <mn>1.60</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>3</mn> </mrow> </msup> <mo>></mo> <mn>6.16</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msup> <mo>></mo> <mn>3.07</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msup> <mtext> </mtext> <mtext>mA</mtext> <mo>/</mo> <mtext>c</mtext> <msup> <mrow> <mtext>m</mtext> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </math> for 1100, 600, and as cast, respectively. Co concentration above 20% increases the corrosion current ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M7> <msub> <mrow> <mi>I</mi> </mrow> <mrow> <mtext>corr</mtext> </mrow> </msub> </math> ) and decreases the polarization resistance of the remain samples. The chemical analysis done with EDS and X-ray diffraction made confirmed the presence of compounds such as CoAl, Co2Al5, Co2Al9, MnAl4, and MnAl6." @default.
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- W3209627189 date "2021-11-03" @default.
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- W3209627189 title "Heat Treatment Effect in the Corrosion Resistance of the Al-Co-Mn Alloys Immersed in 3 M KOH" @default.
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- W3209627189 doi "https://doi.org/10.1155/2021/3458957" @default.
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