Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Jurnal Teknosains International Journal of Marine Engineering Innovation and Research
Muhammad Luqman Hakim
Departement of Naval Architecture, University of Diponegoro
Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Study of Rescheduling of MV Alfa Trans Satu Ship Repair Using Critical Path Method (CPM) and Project Evaluation and Review Technique (PERT) Parlindungan Manik; Rika Afrodiyanti; Muhammad Luqman Hakim
International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.19043

Abstract

The ship repair project must work according to the schedule agreed in the work contract. However, in the process there are often delays between the initial plan and work in the field. The scheduling method is one of the influences on the success of repairs in order to produce efficient scheduling and cost planning. Based on these conditions, this study aims to obtain a new duration and the most optimal cost of crashing through an alternative, namely additional working hours (overtime hours) and additional workforce in the MV Alfa Trans Satu Ship repair project by applying the CPM and PERT methods. Based on the crash duration calculation using the CPM, the most effective and efficient alternative that can be used to accelerate the MV Alfa Trans Satu Ship repair project is by adding a workforce of 32 Person (an increase of 30% from the initial workforce). This acceleration alternative produces a duration below the normal duration, 21 days from the initial 25 days. The probability of success for this project using the PERT method can be completed within 21 days of 98.46%. The percentage increase in costs is only 4% of the normal for critical work, IDR 50,800,000.
Impacts of temperature and coating pigment ratios on the corrosion rate of ss400 steel Budiarto, Untung; Firdhaus, Ahmad; Hakim, Muhammad Luqman; Tuswan, Tuswan; Yusuf, Fauzan Ammar Fata
Jurnal Teknosains Vol 13, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.85518

Abstract

Steel is the primary shipbuilding material; however, it erodes quickly. Adequate protection requires hard, durable, and adhesive coatings. This study examines how aluminium-graphite pigment and heat treatment affect epoxy-coated SS400 steel plate corrosion, adhesion, and coating resilience. This study used a 1:1 and 3:1 pigment ratio with 100°C and 150°C heat treatment. The coating layer was 250 μm thick and comprised 80% epoxy and 20% aluminum-graphite. The maximum adhesion strength, 19.62 MPa, was achieved with an aluminium-graphite pigment ratio of 1:1 and 100°C heat treatment. The top coating resistance was 6.86 Joules under identical conditions. The lowest corrosion rate, 0.047 mmpy, was at a 3:1 aluminum-graphite ratio and 150°C heat treatment. This discovery has significant consequences for shipbuilding steel corrosion resistance.
Co-Authors Ahmad Firdhaus Parlindungan Manik Rika Afrodiyanti Tuswan Tuswan Untung Budiarto Yusuf, Fauzan Ammar Fata