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All Journal Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Didaktik : Jurnal Ilmiah PGSD STKIP Subang
Yudi Oktavia Ramadhan
Universitas Sultan Ageng Tirtayasa
Education Energy Materials Science & Nanotechnology Mechanical Engineering Transportation

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PERAN INHIBITOR KOROSI PADA PROSES DAN HASIL PRODUKSI BAJA: STUDI LITERATUR REVIEW sahril - sabirin; andika cahya febiawan; Ardika Achmad Gustama; Faris Ahmad Irfany; Yudi Oktavia Ramadhan; Ananda Yhuto Wibisono Putra
Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Vol 8, No 1 (2023): Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mecha
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jtmm.v8i1.4025

Abstract

This study aims to determine the definition of corrosion, types of corrosion, corrosion protection in the steel production process, corrosion protection using inhibitors, types of inhibitors, and types of inhibitors for various materials. The research approach is a qualitative approach with a literature review research method. The research data obtained were analyzed descriptively and quantitatively. This research was conducted by systematically analyzing literary sources in the form of scientific articles, books, accompaniments and theses from reliable sources. The results of this study examine the process of corrosion protection in steel production processes and products using various types of inhibitors. The result is that the coiled coil material is subjected to a continuous curing line to produce galvanized steel coils, which can lead to corrosion of the material, among other things by environmental concentrations. The corrosion process can be prevented in various ways, one of which is with an inhibitor. The types of inhibitors used consist of organic and inorganic materials. The inorganic inhibitors used were EonCor W203, while the organic inhibitors used were extracts of guava leaves, tea leaves, soybeans and coffee.
PENGARUH KOMPETENSI KEAHLIAN DAN PRAKTIK KERJA LAPANGAN TERHADAP KESIAPAN KERJA SISWA DI SMKN 2 PANDEGLANG Yudi Oktavia Ramadhan; Deddy Supriyatna; Ade Dwi Putra Janata
Didaktik : Jurnal Ilmiah PGSD STKIP Subang Vol. 12 No. 3 (2026): Volume 12 No. 3, September 2026 Produce
Publisher : STKIP Subang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36989/didaktik.v12i3.17959

Abstract

This study aimed to determine the effect of vocational competence and field work practice on the work readiness of grade XII students in the Light Vehicle Engineering Expertise Concentration at SMKN 2 Pandeglang. This research used a quantitative approach with an ex-post facto method. The population consisted of 43 students, all of whom were selected as the sample using saturated sampling. Vocational competence data were obtained from the Vocational Competency Test scores, while field work practice and work readiness data were collected using questionnaires. Data analysis included descriptive statistics, validity and reliability tests, prerequisite tests, multiple linear regression, t-test, F-test, and coefficient of determination. The results showed that: (1) vocational competence did not have a significant effect on students' work readiness, with t = -0.600 and Sig. = 0.552, with a contribution of 0.8%; (2) field work practice had a positive and significant effect on work readiness, with t = 4.878 and Sig. = 0.000, and R² = 0.362 or 36.2%; and (3) vocational competence and field work practice simultaneously had a significant effect on work readiness, with F = 11.999 and Sig. = 0.000. The coefficient of determination of 0.369 indicates that both variables jointly contributed 36.9% to students' work readiness, while the remaining 63.1% was influenced by other factors.
Co-Authors Ade Dwi Putra Janata Ananda Yhuto Wibisono Putra andika cahya febiawan Ardika Achmad Gustama Deddy Supriyatna Faris Ahmad Irfany sahril - sabirin