EVALUASI KINERJA DAN MEKANISME ADSORPSI EKSTRAK KULIT BATANG POHON KAPUK SEBAGAI INHIBITOR KOROSI PADA STAINLESS STEEL 304

Authors

  • Syarif Hidayatullah

    University of mataram
    Author
  • Ahmad Akromul Huda

    Jurusan Teknik Mesin Fakultas Teknik Universitas Mataram
    Author

Keywords:

Stainless steel, Inhibitor alam, Korosi logam, Adsorpsi isotermal

Abstract

Penelitian ini berupaya meningkatkan kemampuan ekstrak kulit batang pohon kapuk sebagai inhibitor korosi ramah lingkungan untuk stainless steel 304 (SS) dalam media 1 M HCl. Untuk menilai efektivitas dan mekanisme ekstrak tersebut dalam menghambat korosi, digunakan metode investigasi seperti pengujian eksperimen Polarisasi Potensiodinamik (PDP) dan analisa adsorpsi Isotermal. Temuan eksperimen PDP menunjukkan bahwa kemampuan penghambatan ekstrak sangat dipengaruhi oleh konsentrasinya, dengan efisiensi mencapai 74.72% pada konsentrasi 3000 mg/L. Data PDP mengonfirmasi bahwa inhibitor ini bertindak sebagai inhibitor campuran yang efektif dalam memperlambat proses korosi pada stainless steel. Selain itu, perilaku adsorpsi ekstrak mengikuti model isoterm Langmuir dan bersifat kemisorpsi dan fisisorpsi seperti terjadinya interaksi elektrostatik antara inhibitor yang terionisasi dengan permukaan logam dan melibatkan pembentukan ikatan kovalen. Secara keseluruhan, mekanisme terjadi melalui proses adsorpsi heteroatom seperti oksigen (O), nitrogen (N), sulfur (S), fosfor (P), dan struktur molekul cincin aromatik dari ekstark kulit batang pohon kapuk ke permukaan stainless steel sehingga memungkinkan terbentuknya lapisan pelindung untuk menurunkan laju korosi.

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Published

2025-11-29