DETEKSI PROSES KOROSI PADA BAJA DENGAN MENGGUNAKAN LAPISAN AKRILIK TERMODIFIKASI PHENOLPHTHALEIN
DOI:
https://doi.org/10.32493/jtc.v3i2.7518Abstract
Masalah korosi merupakan salah satu pertimbangan biaya pemeliharaan dalam proses produksi industri minyak dan gas bumi, petrokimia dan geothermal. Salah satu metode mitigasi korosi adalah proses pelapisan polimer atau cat. Walaupun struktur di lapis oleh cat, proses korosi terjadi karena preparasi permukaan yang tidak benar. Proses deteksi dini korosi dibawah lapisan cat bisa salah satu kandidat untuk mengurangi kerusakan lebih lanjut. Material senyawa cerdik adalah phenolphthalein (PP) diperlukan sebagai indikator terjadinya korosi. Konsentrasi senyawa PP divariasikan dengan sebesar 0,01% ; 0,1 % dan 1% yang diimbuhkan ke lapisan berbasis akrilik. Pengujian perfoma lapisan cat melalui pengujian kabut garam (ASTM B117-97) selama 240 jam. Metode visualisasi secara makro dilakukan untuk melihat kerusakan cat. Perfoma senyawa PP pada cat dengan konsentrasi 0,01% dan 1% memberikan indikasi bercak warna jingga di waktu ekspos 24 jam. Reaksi oksidasi dan reduksi (elektrokimia) berlangsung pada daerah antar muka lapisan cat dan substrak baja melalui visualisasi warna jingga.References
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