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Stevi Silahooy
Pattimura University
Chemistry Education Mathematics Physics Social Sciences

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Analisis Serbuk Silika Amorf (SiO2) Berbahan Dasar Pasir Stevi Silahooy
Science Map Journal Vol 2 No 2 (2020): Science Map Journal
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jmsvol2issue2pp75-78

Abstract

The aim of the research was to synthesize amorphous silica powder (SiO2) made from sand obtained from the Bancar-Tuban area using the hydrothermal-coprecipitation method using 7M NaOH as solvent. The samples obtained were characterized using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). The characterization results show that there has been an increase in the percentage of weight (wt%) Si from 71.5% to 92.20%. The structure of the silica formed is a with non-uniform particle size with an average size exceeding ≥110.09 nm. The results of observations using SEM instruments that were carried out using various variations showed that the SiO2 particle size was not uniform, where the SiO2 powder tended to agglomerate
STUDI LAJU KOROSI STAINLESS STEEL (SS304) TERLAPISI CAT AGATHA PAINT PADA MEDIUM NACL 3,5% Stevi Silahooy; Delpina Nggolaon
Science Map Journal Vol 5 No 1 (2023): Science Map Journal
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jmsvol5issue1pp19-22

Abstract

Pada penelitian ini telah dilakukan studi laju korosi dari Stainless steel (SS304) terlapisi cat agatha paint pada medium NaCl 3,5%. Penelitian ini akan dijadikan sebagai data primer dalam melakukan penelitian berkelanjutan. Pengujian laju korosi dari Stainless steel (SS304) menggunakan metode analisis tafel berbantuan alat potensiometer. Hasil penelitian menunjukan bahwa laju korosi sebesar 0.002 mmpy dengan arus korosi dan tegangan korosi yang diperoleh sebesar 200.820nA dan -229.800mV.
Co-Authors Ashari Bayu P. Dulhasyim Batlolona, John Rafafy Delpina Nggolaon Jamaludin Jamaludin