Detail Cantuman

The Influence Of Variations Concentration Inhibitor Extract From Wastee Leaves Papaya To The Rate Corrosion and Microstructure Steel Tube ASTM A53
In a Media Sea Water


Jaya Dwi Muttaqin
Study Program of Machine Automotive
Majoring of Engineering

ABSTRACT

Corrosion is a form of defect that occured on metal. Many factors that can causes corrosion on material, one of them is media corrosion (sea water). Corrosion can not be removed but can be reduced. There are several methods for reducing the rate of the corrosion. One of them is using green inhibitor. Inhibitor was obtained from organic material that contained phenolic substaince. This riset using papaya leaves for green inhibitor to the pipe steel ASTM A53 with sea water as a media of corrosion by use variation cocentration of green inhibitor 0%, 5%, 10% and 15% because papaya leaves contained 11,333 µgAGE/g of phenolic substance . From some variation of green corrosion inhibitor obtained the results of the lowest in variation concentration green inhibitor 15% the average value of the rate of corrosion is 0,027 mm/y acquired from using method of weight loss and the efficiency is 50,900%. Based on the microstructure scanning test while the corrosion that is thin , then lost weight on the specimen is also limited. While the result of thin corossion, weight losses in the specimen is smaller. The maximuum results of microstucture scanning test by the using 15% of concentration extract inhibitor is thin corossion and weight losses in the specimen is smaller then other.

Keywords : papaya leaves, inhibitor, corrosion rate, pipe steel ASTM A53

PENGARUH VARIASI KONSENTRASI INHIBITOR EKSTRAK DAUN PEPAYA TERHADAP LAJU KOROSI DAN MIKROSTRUKTUR
PIPA BAJA ASTM A53 PADA MEDIA AIR LAUT

Jaya Dwi Muttaqin
Program Studi Mesin Otomotif
Jurusan Teknik

ABSTRAK

Korosi merupakan suatu bentuk kerusakan yang terjadi pada logam. Banyak faktor yang dapat menyebabkan korosi suatu material, salah satunya media korosif (air laut). Korosi sendiri tidak dapat dihilangkan melainkan lajunya dapat dikurangi. Terdapat beberapa metode untuk mengurangi laju korosi. Salah satunya menggunakan green inhibitor. Green inhibitor didapatkan dengan cara mengekstrak bahan organik yang mengandung senyawa fenolik. Pada penelitian ini digunakan daun pepaya sebagai green inhibitor pada pipa baja ASTM A53 dengan media korosif air laut menggunakan variasi konsentrai green inhibitor 0%, 5%, 10% dan 15% karena daun pepaya memiliki kadar fenolik sebesar 11,333 µgAGE/g. Sehingga, dari beberapa variasi konsentrasi green inhibitor yang ada didapatkan laju korosi terendah pada variasi konsentrasi green inhibitor 15% dengan nilai rata-rata laju korosi 0,027 mm/y dengan menggunakan metode perhitungan weight loss dan hasil efisiensinya 50,900 %. Berdasarkan hasil uji mikrostuktur yang dilakukan, semakin tebal korosi yang terjadi kehilangan berat pada spesimen semakin besar. Sedangkan hasil korosi yang tipis, maka kehilangan berat pada spesimen juga semakin kecil. Pada uji mikrostuktur hasil paling maksimal adalah dengan menggunakan campuran variasi konsentrasi ekstrak inhibitor 15 % hasil korosi lebih tipis dan kehilangan berat semakin kecil.

Kata Kunci : Daun pepaya, inhibitor, laju korosi, pipa baja ASTM A53