Analisa Laju Korosi Pada Pelat Baja Karbon Dengan Variasi Ketebalan Coating
Submission Date: 2015-02-03 09:20:21
Accepted Date: 2015-03-13 00:00:00
Abstract
Baja karbon rendah adalah baja yang paling banyak digunakan sebagai bahan pembuatan kapal. Sebagai moda transportasi yang beroperasi pada lingkungan laut yang korosif, maka diperlukan suatu perlindungan coating agar korosi yang terjadi bisa diperkecil. Pada pengujian ini, coating sengaja divariasikan ketebalannya. Hal ini mengacu pada tidak meratanya proses coating pada pelat lambung kapal, dikarenakan pengerjaan coating dilakukan secara manual dengan area yang dicat cukup luas. Sehingga kemungkinan terlalu tebal ketebalan coating bisa saja terjadi di area tertentu. Sistem coating yang diuji ada dua, yaitu sistem coating dua lapis dengan menggunakan cat Alkyd dan sistem tiga lapis dengan menggunakan cat Epoxy. Pengujian dan perhitungan laju korosinya dengan menggunakan metode elektrokimia. Dari hasil perhitungan dapat disimpulkan bahwa semakin tebal lapisan suatu coating tidak menjamin coating tersebut dapat melindungi dengan sempurna. Semakin tebal suatu coating memiliki resiko kegagalan coating lebih besar seperti, berkurangnya fleksibilitas, terjadinya pengerutan, atau pengeringan yang tidak sempurna.
Keywords
: Baja Karbon; Coating; Laju Korosi; Metode Elektrokimia
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