The Effect of Blackening Coating on Widia Tool Holder on Corrosion Rate

DOI

10.2991/978-94-6463-768-7_38How to use a DOI?

Keywords

corrosion; blackening; coating

Abstract

This study examines the effect of the blackening method on the corrosion rate of Widia Tools in seawater and rainwater immersion media. Blackening is a black oxide coating process that aims to protect metal from corrosion and increase wear resistance. The blackening coating procedure goes through the stages of making NaOH, NaNO₂, and NaNO₃ solutions, as well as the pickling process for surface cleaning. Microstructural analysis shows the formation of a thin layer of magnetite (Fe₃O₄) on the coated metal surface, which functions as a corrosion barrier. Corrosion testing uses the weight lost method with specimen testing times on the 7th, 21st, and 49th days. The results showed a decrease in the corrosion rate of around 33% between immersion of Widia tools in seawater and rainwater. Seawater provides a decrease in the corrosion rate based on consecutive test days of 0.03 mpy, 0.01 and 0.003 mpy, while rainwater provides a decrease in the corrosion rate based on consecutive test days of 0.005 mpy, 0.003 and 0.002 mpy. Seawater has a high salt content so it has a more corrosive environment compared to rainwater. Its shows that blackening is effective in increasing corrosion resistance so that the service life of Widia tools is longer, especially in industrial applications with corrosive environments. The application of blackening technology to Widia tools offers a solution to improve the performance and durability of cutting tools in the manufacturing industry.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Eriek Aristya Pradana Putra
AU  - Umi Novida Yanti
AU  - Angga Tegar Setiawan
AU  - J. Muh. Azis Albar
AU  - Dewi Purnama Sari
PY  - 2025
DA  - 2025/07/07
TI  - The Effect of Blackening Coating on Widia Tool Holder on Corrosion Rate
BT  - Proceedings of the 3rd International Conference on Science in Engineering and Technology (ICOSIET 2024)
PB  - Atlantis Press
SP  - 343
EP  - 350
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-768-7_38
DO  - 10.2991/978-94-6463-768-7_38
ID  - Putra2025
ER  -