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      Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance

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      Date
      2011
      Author
      Marist, Adi Irianto
      Mulijani, Sri
      Sukaryo, Aulistioso Giat
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      Abstract
      Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
       
      Logam yang digunakan untuk proses implantasi harus memiliki ketahanan korosi yang baik agar tidak mudah terkorosi ketika diimplan ke dalam tubuh. Ketahanan korosi logam stainless steel 316 dapat ditingkatkan melalui pelapisan logam oleh komposit hidroksiapatit-kitosan dengan nisbah komposisi hidroksiapatit (gram) dan kitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, dan 0.2:1.5. Keberadaan kitosan selain untuk meningkatkan ketahanan korosi dari logam tetapi juga untuk mempertahankan posisi hidroksiapatit tetap pada permukaan logam. Ketahanan korosi meningkat seiring dengan meningkatnya jumlah kitosan yang ditambahkan dengan komposisi hidroksiapatit-kitosan optimum 0.2:1.0.
       
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      http://repository.ipb.ac.id/handle/123456789/51393
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      • UT - Chemistry [2295]

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