Iqbal, Fikra Muhammad (2019) Pengaruh Konsentrasi, Temperatur dan Waktu Perendaman Ekstrak Daun Pandan Sebagai Inhibitor Korosi Baja API 5L Grade B Dalam Larutan HCl 1M. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Korosi tidak dapat dihentikan, tetapi dapat di kurangi lajunya. Korosi biasanya menyerang pada bagian seperti pipa. Pipa yang digunakan pada penelitian ini adalah pipa baja API 5L Grade B, karena memiliki corrosion resistance yang rendah dibandingkan jenis baja lainnya. Terdapat beberapa metode yang dapat digunakan untuk mengurangi laju korosi, contohnya Inhibitor. Inhibitor organik digunakan untuk membentuk lapisan pelindung untuk mengurangi laju korosi. Daun pandan dapat dijadikan inhibitor organik dikarenakan memiliki kandungan kimia seperti tanin yang dapat dijadikan inhibitor korosi. Penelitian ini menggunakan pengujian Weightloss, EIS dan polarisasi untuk menganalisa mekanisme laju korosi dari hasil weightloss diperoleh laju korosi terendah pada konsentrasi 4000ppm dengan efisiensi 70,2376%. Pada variasi temperatur diperoleh laju korosi terendah dengan menggunakan konsentrasi 4000ppm yaitu pada temperatur 27 oC dengan efesiensi sebesar 70,2376%. Pada variasi lama perendaman didapatkan laju korosi terendah dengan menggunakan konsentrasi 4000ppm yaitu pada hari ke-4 dengan efesiensi sebesar 73,4376%. Hasil polarisasi menunjukan bahwa mekanisme inhibitor bertipe mixing inhihibitor.
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Corrosion cannot be stopped, but it can reduce the speed of corrosion resistance. Corrosion usually attacks parts such as pipes. The pipe used in this study is API 5L Grade B steel pipe because it has low corrosion resistance compared to other types of steel. Several methods can be used to reduce corrosion rates, for example, inhibitors. Organic inhibitors are used to form a protective layer to reduce the corrosion rate. Pandan leaves can be used as organic inhibitors because they contain chemicals such as tannins, which can be used as corrosion inhibitors. This study uses Weightloss, EIS and Polarization testing to analyze the corrosion rate mechanism. Besides, using a Stereo Microscope, FTIR and AAS testing as supporting tests of this study. From the weight loss results obtained the lowest corrosion rate at 4000ppm with an efficiency of 70,2376%. At the temperature variation, the lowest corrosion rate was obtained by using 4000ppm concentration at a temperature of 27 oC with an efficiency of 70,2376%. In the variation of immersion time the lowest corrosion rate was obtained using 4000ppm concentration on the 4th day with an efficiency of 73,4376%. The polarization results showed that the mixing inhibitor type inhibitor mechanism.
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