Abstract
Method has been carried out. Research is done on mild steel zincalume type with immersion treatment (NaCl 3.5%) for 10 days, and 30 days and without immersion. Mild steel is laser irradiated (Nd-YAG 1064 nm, 7 ns) with energy of 120 mJ, and the data is taken with an accumulation of 3, delay time of 0.5 µs. Elements identification is done by taking data from up to 75 μm from the surface. The results of the analysis with LIBS showed immersion for 10 days, the corrosion rate and hardness of mild steel increased with 30 days immersion. The increase in the corrosion rate of mild steel is indicated by decreasing the value of dissolved oxygen intensity, the electrochemical reaction is fast. The decrease in the corrosion rate is indicated by the increase in the intensity value of Zn and Al elements associated with the formation of a passive film on the metal surface as a protective layer to protect further corrosion attacks.
Highlights
A reseach on the analysis of the corrosivity of mild steel using the Laser Induced Breakdown Spectroscopy (LIBS)
Research is done on mild steel zincalume type with immersion treatment
the data is taken with an accumulation
Summary
A reseach on the analysis of the corrosivity of mild steel using the Laser Induced Breakdown Spectroscopy (LIBS). Telah dilakukan penelitian analisis korosifitas baja ringan dengan metoda Laser Induced Breakdown Spectroscopy (LIBS). (2021), Analisis Korosifitas Baja Ringan dengan Metoda Laser Induced Breakdown Spectroscopy (LIBS), Kappa Journal. Penelitian mengenai baja ringan pernah dilakukan oleh Suyanto (2013) dengan metode Laser Induced Breakdown Spectroscopy (LIBS), kelebihan dari metode ini yaitu dapat menganalisis unsur-unsur yang merupakan penyusun utama bahan dan unsur-unsur tambahan akibat kontaminasi lingkungan, akan tetapi dalam penelitian tersebut tidak membahas korosifitas baja ringan. Oleh karena itu dalam penelitian ini akan berfokus untuk menganalisis korosifitas baja ringan dengan metode Laser Induced Breakdown Spectroscopy (LIBS). Karena unsur aluminium (Al) dan zinc (Zn) merupakan pelapis pelindung dari korosi pada baja ringan, maka pada penelitian ini dilakukan analisis konsentrasi (intensitas) dari unsur Al dan Zn, pengaruh lama perendaman dalam larutan NaCl 3,5% terhadap korosifitas
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