Sintesis dan Karakterisasi ZnO sebagai Coating Antikorosi ZnO/Al(OH)3 Pada Material Baja Karbon

*Adhi Setiawan -  Politeknik Perkapalan Negeri Surabaya, Indonesia
Dikirim: 20 Agu 2017; Diterbitkan: 31 Jul 2018.
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ZnO seringkali digunakan sebagai aplikasi pigmen anti korosi pada logam karena tidak beracun, ramah lingkungan, murah serta memiliki ketahanan korosi yang relatif baik. Artikel ini memuat penelitian dalam melakukan  sintesa  partikel  ZnO  menggunakan  metode  presipitasi  dengan  ZnCl2  dan  NaOH  sebagai prekursor. Partikel ZnO yang dihasilkan memiliki morfologi berbentuk batang dengan ujung lancip. Hasil SEM menunjukkan bahwa pada konsentrasi NaOH sebesar 0,5 M dihasilkan ZnO dengan ukuran terkecil sebesar  123  nm  dan  hasil  XRD  menunjukkan  bahwa  ZnO  memiliki  kristalinitas  tinggi  dengan  ukuran kristal mencapai 47 nm. Hasil penelitian menunjukkan bahwa pada komposisi ZnO/Al(OH)3 sebesar 1:3 menjadikan  specimen  baja  karbon  memiliki  ketahanan  korosi  yang  terbaik  dengan  nilai  laju  korosi terendah sebesar 0,86 mpy.
Kata Kunci
ZnO; ketahanan korosi; coating; polarisasi linear; SEM

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