ANALISIS LAJU KOROSI PADA MATERIAL BAJA KARBON SPHCPO ASTM A36 TANPA DAN INHIBITOR AMMONIUM MOLIBDATE DENGAN MEDIA NaCl MENGGUNAKAN METODE PENGUJIAN SALT SPRAY TEST

RIZKI, MUHAMMAD (2025) ANALISIS LAJU KOROSI PADA MATERIAL BAJA KARBON SPHCPO ASTM A36 TANPA DAN INHIBITOR AMMONIUM MOLIBDATE DENGAN MEDIA NaCl MENGGUNAKAN METODE PENGUJIAN SALT SPRAY TEST. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Low carbon steel, especially SPHCPO (Structural Carbon Steel Pipe Outside Diameter) carbon steel, is widely used in the automotive industry due to its good mechanical strength and toughness. However, this type of steel is susceptible to corrosion, especially when exposed to salt-containing environments (NaCl). Corrosion can cause structural damage and increase maintenance costs. Therefore, this study aims to analyze the corrosion rate of SPHCPO carbon steel in NaCl media using the Salt Spraying Test method without and with ammonium malibdate coating so that its protection can be compared against the service life of the material. Corrosion rate testing using SPHCPO carbon steel material measuring 12 cm x 3.5 cm without and with ammonium molybdate inhibitor at time variations of 0, 72, 120 and 168 hours using the salt spraying test method. The results of the corrosion rate analysis obtained the highest corrosion rate on SPHCPO carbon steel metal with an average test duration of 72 hours 0.07615 mg/cm2 hour, 120 hours 0.08036 mg/cm2 hour, 168 hours 0.08855 mg/cm2 hour and with ammonium molybdate inhibitor obtained the lowest rate with an average of 72 hours 0.07184 mg/cm2 hour, 120 hours 0.06879 mg/cm2 hour, 168 hours 0.06521 mg/cm2 hour. It can be concluded that based on this data the ammonium molybdate inhibitor is able to slow down the corrosion rate with an efficiency of 26%. It is expected that the results of this data will be useful for the motor industry and related to SPHCPO Carbon Steel so that the corrosion rate can be known. Keywords: SPHC PO Steel, Corrosion, Salt Spray Test, Corrosion Rate, Optical Mikroscope Baja karbon rendah, khususnya baja karbon SPHCPO (Structural Carbon Steel Pipe Outside Diameter), banyak digunakan dalam industri otomotif karena kekuatan mekaniknya yang baik dan ketangguhannya. Namun, baja jenis ini rentan terhadap korosi, terutama ketika terpapar lingkungan yang mengandung garam (NaCl). Korosi dapat menyebabkan kerusakan struktural dan meningkatkan biaya perawatan. Oleh karena itu, penelitian ini bertujuan untuk menganalisis laju korosi pada baja karbon SPHCPO dalam media NaCl menggunakan metode salt spraying test tanpa dan dengan yang dilapis ammonium malibdate agar dapat dibandingkan proteksinya terhadap umur pakai material. Pengujian laju korosi menggunakan material baja karbon SPHCPO ukuran 12 cm x 3,5 cm tanpa dan dengan menggunakan inhibitor ammonium molibdate pada variasi waktu 0, 72, 120 dan 168 jam dengan menggunakan metode pengujian salt spraying test. Hasil analisis laju korosi didapatkan laju korosi tertinggi pada logam baja karbon SPHCPO dengan rata rata durasi waktu pengujian 72 jam 0,07615 mg/cm2 jam, 120 jam 0,08036 mg/cm2 jam, 168 jam 0,08855 mg/cm2 jam dan dengan inhibitor ammonium molibdate didapatkan laju terendah dengan rata rata 72 jam 0,07184 mg/cm2 jam, 120 jam 0,06879 mg/cm2 jam, 168 jam 0,06521 mg/cm2 jam. Dapat disimpulkan bahwa berdasarkan data ini inhibitor ammonium molibdate mampu memperlambat laju korosi dengan efisiensi 26% pada durasi waktu 168 jam. Diharapkan hasil data ini diharapkan bermanfaat untuk industri motor dan terkait pada baja karbon SPHCPO sehingga dapat diketahui laju korosi. Kata kunci : Baja SPHCPO, Korosi, Salt Spray Test, Laju Korosi, Mikroskop Optikal

Item Type:	Thesis (S1)
Call Number CD:	FT/MSN. 25 055
NIM/NIDN Creators:	41321010008
Uncontrolled Keywords:	Baja SPHCPO, Korosi, Salt Spray Test, Laju Korosi, Mikroskop Optikal
Subjects:	500 Natural Science and Mathematics/Ilmu-ilmu Alam dan Matematika > 500. Natural Science and Mathematics/Ilmu-ilmu Alam dan Matematika > 502 Miscellany of Nature Sciences/Aneka Ragam tentang Ilmu Pengetahuan Alam > 502.8 Auxiliary Techniques and Procedures; Apparatus, Equipment, Materials/Teknik dan Prosedur Bantu; Peralatan, Peralatan, Bahan > 502.82 Microscopy/Mikroskopi > 502.825 Electron Microscopes/Mikroskop elektron 500 Natural Science and Mathematics/Ilmu-ilmu Alam dan Matematika > 550 Earth Sciences/Ilmu tentang Bumi > 553 Economic Geology/Geologi Ekonomis > 553.2 Carbonaceous Materials/Material Karbon 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin 600 Technology/Teknologi > 660 Chemical Engineering and Related Technologies/Teknologi Kimia dan Ilmu yang Berkaitan > 669 Metallurgy/Metal, Metalurgi 600 Technology/Teknologi > 660 Chemical Engineering and Related Technologies/Teknologi Kimia dan Ilmu yang Berkaitan > 669 Metallurgy/Metal, Metalurgi > 669.1 Ferrous Metals/Metalurgi Logam Besi dan Baja
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	khalimah
Date Deposited:	21 Aug 2025 02:25
Last Modified:	21 Aug 2025 02:25
URI:	http://repository.mercubuana.ac.id/id/eprint/96926

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