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54. According to this table; how long will it take for Cu to form 1cm thick oxide on its structure? Table 24.2 Time in Hours for Material to Be Oxidized to a Depth of 0.1 mm at 0.7 TM in Air Material Time Melting Point (K) Material Time Melting Point (K) Au Ag Al Si3N4 SiC Sn Be Pt Mg Zn Cr Na Infinite? Very long Very long Very long Very long Very long 2 x 105 106 1.8 x 105 >105 >104 1600 1000 1336 1234 933 2173 3110 505 1683 1557 2042 923 692 2148 371 Ni Cu Fe Co Ti WC cermet Ba Zr Ta Nb U Mo W 600 25 24 7 <6 <5 *0.5 0.2 Very short Very short Very short Very short Very short 1726 1356 1809 1765 1943 1700 983 2125 3250 2740 1405 2880 3680

54. According to this table; how long will it take for Cu to form 1cm thick oxide on its structure? Table 24.2 Time in Hours for Material to Be Oxidized to a Depth of 0.1 mm at 0.7 TM in Air Material Time Melting Point (K) Material Time Melting Point (K) Au Ag Al Si3N4 SiC Sn Be Pt Mg Zn Cr Na Infinite? Very long Very long Very long Very long Very long 2 x 105 106 1.8 x 105 >105 >104 1600 1000 1336 1234 933 2173 3110 505 1683 1557 2042 923 692 2148 371 Ni Cu Fe Co Ti WC cermet Ba Zr Ta Nb U Mo W 600 25 24 7 <6 <5 *0.5 0.2 Very short Very short Very short Very short Very short 1726 1356 1809 1765 1943 1700 983 2125 3250 2740 1405 2880 3680

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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54. According to this table; how long will it take for Cu to form 1cm thick oxide on its structure? Table 24.2 Time in Hours for Material to Be Oxidized to a Depth of 0.1 mm at 0.7 T in Air Material Time Melting Point (K) Material Time Melting Point (K) Au Infinite? 1336 Ni 600 1726 Very long Very long Very long Very long Very long 2 x 106 106 Ag 1234 Cu 25 1356 Al 933 Fe 24 1809 Si,Na 2173 Co 7 1765 Sic 3110 Ti <6 1943 Sn 505 WC cermet <5 1700 Si 1683 Ва «0.5 983 Be 1557 Zr 0.2 2125 1.8 x 105 >105 >104 Pt Ta Very short Very short Very short Very short 2042 3250 Mg 923 Nb 2740 Zn 692 U 1405 Cr 1600 2148 Мо 2880 Na >1000 371 Very short 3680 K >1000 337 Note: Data subject to considerable variability due to varying degrees of material purity, prior surface treatment, and presence of atmospheric impurities such as sufur. (a) 1200 hours (b) 240 hours (c) 2400 hours (d) not enough information
Transcribed Image Text:54. According to this table; how long will it take for Cu to form 1cm thick oxide on its structure? Table 24.2 Time in Hours for Material to Be Oxidized to a Depth of 0.1 mm at 0.7 T in Air Material Time Melting Point (K) Material Time Melting Point (K) Au Infinite? 1336 Ni 600 1726 Very long Very long Very long Very long Very long 2 x 106 106 Ag 1234 Cu 25 1356 Al 933 Fe 24 1809 Si,Na 2173 Co 7 1765 Sic 3110 Ti <6 1943 Sn 505 WC cermet <5 1700 Si 1683 Ва «0.5 983 Be 1557 Zr 0.2 2125 1.8 x 105 >105 >104 Pt Ta Very short Very short Very short Very short 2042 3250 Mg 923 Nb 2740 Zn 692 U 1405 Cr 1600 2148 Мо 2880 Na >1000 371 Very short 3680 K >1000 337 Note: Data subject to considerable variability due to varying degrees of material purity, prior surface treatment, and presence of atmospheric impurities such as sufur. (a) 1200 hours (b) 240 hours (c) 2400 hours (d) not enough information
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