Pengaruh Konsentrasi Inhibitor Ekstrak Labu Kuning dan Temperatur terhadap Laju Korosi Aluminium dalam Media Air Laut
DOI:
https://doi.org/10.55606/isaintek.v9i1.397Keywords:
Korosi aluminium, inhibitor ekstrak labu kuning, laju korosi, weight loss, temperaturAbstract
Korosi pada aluminium dalam lingkungan air laut merupakan permasalahan serius yang dapat menurunkan umur pakai material. Berbagai inhibitor alami telah dikembangkan sebagai alternatif ramah lingkungan, tetapi kajian mengenai penggunaan ekstrak labu kuning sebagai inhibitor korosi aluminium dalam media air laut, terutama dengan mempertimbangkan pengaruh temperatur, masih terbatas. Penelitian ini bertujuan untuk menganalisis pengaruh konsentrasi inhibitor ekstrak labu kuning dan temperatur terhadap laju korosi aluminium menggunakan metode weight loss. Variasi konsentrasi inhibitor yang digunakan adalah 0 ppm, 1000 ppm, 2000 ppm, dan 3000 ppm, dengan variasi temperatur 27°C, 35°C, dan 45°C selama waktu perendaman 24 jam. Hasil penelitian menunjukkan bahwa peningkatan konsentrasi inhibitor secara signifikan menurunkan laju korosi, dengan nilai optimum pada 3000 ppm yang menghasilkan laju korosi sebesar 0,448 mm/year dan efisiensi inhibisi sebesar 74,06%. Sebaliknya, peningkatan temperatur menyebabkan kenaikan laju korosi dan penurunan efisiensi inhibitor. Analisis parameter aktivasi menunjukkan bahwa penambahan inhibitor meningkatkan energi aktivasi (Ea) dari 17,075 kJ/mol menjadi 28,432 kJ/mol, yang mengindikasikan bahwa proses korosi menjadi lebih sulit terjadi. Secara keseluruhan, ekstrak labu kuning terbukti efektif sebagai inhibitor korosi ramah lingkungan yang bekerja melalui mekanisme adsorpsi dan pembentukan lapisan pelindung pada permukaan logam.
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