caa a22 4500 463232771 CHVBK 20180405153247.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0545-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0545-2 Investigation on influence of sodium- or strontium-modification on corrosion-resistance of Al-11.7%Si alloy [Elektronische Daten] [Hengcheng Liao, Guangming Dong, Guoxiong Sun] Weight loss test in 4% sulfuric acid aqueous solution bath and salt spray test with 5% NaCl aqueous solution were used to evaluate the corrosion resistance of Al-11.7wt%Si alloys with no modification, sodium modification, or strontium modification. SEM and optical microscopy were used to, respectively, observe the surface and depth corrosion morphologies of the alloys. The results showed that the corrosion-resistance of the alloy with no modification was the best, followed by the Sr-modified alloy, with the Na-modified alloy showing the worst results. Up to 360h duration in 4% sulfuric acid aqueous solution bath, all the three alloys showed uniform corrosion characteristics. However, after 360h duration, pitting corrosion became the typical characteristic of the modified alloys and it resulted in a considerable increase in percentage weight loss. After 480h, the depth of the pitting holes in the Sr-modified alloy was larger than that in the Na-modified alloy, but the transverse corrosion channels in the former were far less than those in the latter. After this duration, the well-developed transverse corrosion channels in the Na-modified alloy became interconnected inch by inch, which led to severe exfoliation corrosion, so the percentage weight loss of the Na-modified alloy rose abruptly. Springer Science+Business Media, LLC, 2007 Liao Hengcheng Department of Materials Science and Engineering, Southeast University, 210018, Nanjing, China aut Dong Guangming Department of Materials Science and Engineering, Southeast University, 210018, Nanjing, China aut Sun Guoxiong Department of Materials Science and Engineering, Southeast University, 210018, Nanjing, China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 5175-5181 0022-2461 42:13<5175 2007 42 10853 https://doi.org/10.1007/s10853-006-0545-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0545-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liao Hengcheng Department of Materials Science and Engineering, Southeast University, 210018, Nanjing, China aut NATIONALLICENCE 700 1- Dong Guangming Department of Materials Science and Engineering, Southeast University, 210018, Nanjing, China aut NATIONALLICENCE 700 1- Sun Guoxiong Department of Materials Science and Engineering, Southeast University, 210018, Nanjing, China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 5175-5181 0022-2461 42:13<5175 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer