Sains Malaysiana 52(9)(2023): 2699-2711

http://doi.org/10.17576/jsm-2023-5209-18

Performance of Disposable Cu/CuSO₄Reference Electrode in Reinforced Concrete Corrosion Analysis

(Prestasi Elektrod Rujukan Cu/CuSO₄Pakai Buang dalam Analisis Kakisan Konkrit Tetulang)

MUHAMMAD IHSAN^1,2,5, SYARIZAL FONNA²*, SYIFAUL HUZNI², NURUL ISLAMI,³SAGIR ALVA⁴& AHMAD KAMAL ARIFFIN⁵

¹Faculty of Engineering, Universitas Gajah Putih,24552, Takengon, Indonesia

²Department of Mechanical & Industrial Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia

³Material Engineering, Malikussaleh University, Lhokseumawe, Indonesia

⁴Mechanical Engineering Department, Universitas Mercu Buana, West Jakarta, Indonesia

⁵Centre for Integrated Design for Advanced Mechanical Systems

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

Received: 23 December 2022/Accepted: 15 August 2023

Abstract

The investigation of reference electrode performance for corrosion analysis has been widely conducted over the last decade. The need for a disposable and reliable reference electrode is a specific need for corrosion investigation. This research investigated the effectiveness of liquid-based and solid-state reference electrodes, which are disposable and provide reliable performance. The electrode was prepared with low-cost material preparation (disposable usage) within a Copper-Copper Sulphate (CCS) liquid-based and solid-state electrodes. The potential stability was already tested for dependability by measuring the Open Circuit Potential (OCP) on the rebar concrete specimen. The behaviour of solid-state reference and liquid-based reference electrodes in terms of polarization was studied in a corroded environment. Real-time potential data was also obtained for the corrosion rate investigation. The result shows the consistency performance of (OCP) value during corrosion measurement. The deviation of the maximum to a minimum potential value less than 0.02 V, verifies that the liquid-based copper (Cu) electrode and solid-state copper (Cu) electrodes are reliable, adaptable, and disposable for reinforced concrete corrosion measurement. In terms of corroded rebar potential measurement, the real-time polarization measurement result shows that the high-risk corroding occurred on the embedded rebar and was validated by directly visualizing the rebar concrete specimen. Therefore, the results obtained allow us to conclude that the disposable of both reference electrodes shows their stability and significantly reduces the reinforced concrete corrosion research cost.

Keywords: Concrete corrosion; copper-copper sulphate; Cu/CuSo₄; potential analysis; reference electrode

Abstrak

Prestasi elektrod rujukan untuk analisis kakisan dikaji secara meluas sejak beberapa dekad yang lepas. Keperluan khusus untuk penyelidikan kakisan ini adalah untuk mengenal pasti keperluan elektrod rujukan pakai buang dan boleh dipercayai. Penyelidikan ini mengkaji keberkesanan elektrod rujukan berasaskan cecair dan keadaan pepejal yang merupakan prestasi pakai buang dan boleh dipercayai. Elektrod telah disediakan dengan menggunakan bahan kos rendah (pakai buang) dalam elektrod berasaskan cecair dan pepejal Sulfat Kuprum-Kuprum (CCS). Kestabilan potensi telah diuji untuk tujuan yang boleh dipercayai melalui kaedah pengukuran Potensi Litar Terbuka (OCP) pada spesimen konkrit rebar. Kelakuan rujukan keadaan pepejal dan elektrod rujukan berasaskan cecair dari segi polarisasi telah dikaji dalam persekitaran terhakis. Data potensi masa nyata juga diperoleh untuk kajian kadar kakisan. Hasilnya, kajian menunjukkan prestasi ketekalan nilai (OCP) semasa pengukuran kakisan. Sisihan maksimum nilai potensi minimum kurang daripada 0.02 V menunjukkan bahawa elektrod kuprum (Cu) berasaskan cecair dan elektrod kuprum (Cu) keadaan pepejal boleh dipercayai, boleh disesuaikan dan boleh digunakan untuk pengukuran kakisan konkrit bertetulang. Hasil pengukuran polarisasi masa nyata menunjukkan bahawa kakisan berisiko tinggi berlaku pada rebar terbenam melalui proses pemvisualisasi secara langsung spesimen konkrit rebar. Oleh itu, kedua-dua elektrod rujukan pakai buang menunjukkan kestabilannya dan mengurangkan kos penyelidikan kakisan konkrit bertetulang.

Kata kunci: Analisis keupayaan; Cu/CuSo₄; elektrod rujukan; kakisan konkrit; sulfat kuprum-kuprum

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*Corresponding author; email: syarizal.fonna@unsyiah.ac.id