Studies on galvanic corrosion of metallic materials in marine medium

Nejneru, Carmen; Savin, C; Perju, Manuela Cristina; Burduhos-Nergis, Dumitru Doru; Costea, Mariana; Bejinariu, Costică

doi:10.1088/1757-899x/572/1/012106

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…an oxidation process (anodizing) and a reduction process (cathodic). This corrosion is wet erosion and has many effects, as the metal is classified in a specific order, known as the galvanic chain, because the corrosion is bimetallic 9 .…”

Section: Introductionmentioning

confidence: 99%

Protection of Galvanized steel from corrosion in salt media using sulfur nanoparticles

2022

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The characteristics of sulfur nanoparticles were studied by using atomic force microscope (AFM) analysis. The atomic force microscope (AFM) measurements showed that the average size of sulfur nanoparticles synthesized using thiosulfate sodium solution through the extract of cucurbita pepo extra was 93.62 nm. Protecting galvanized steel from corrosion in salt media was achieved by using sulfur nanoparticles in different temperatures. The obtained data of thermodynamic in the presence of sulfur nanoparticles referred to high value as compares to counterpart in the absence of sulfur nanoparticles, the high inhibition efficiency (%IE) and corrosion resistance were at high temperature, the corrosion rate or weight loss decreased with increasing temperature in the presence of sulfur nanoparticles. The positive value of enthalpy ∆H* for galvanized steel with and without sulfur nanoparticles indicates that the reaction was endothermic. Therefore, the sulfur nanoparticles can be suggested as good inhibitor for galvanization in salt media.

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Section: Introductionmentioning

confidence: 99%

Protection of Galvanized steel from corrosion in salt media using sulfur nanoparticles

2022

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“…Dimana korosi galvanik yaitu korosi yang sering terjadi apabila ada dua material berbeda jenis dan memiliki perbedaan beda potensial saling kontak dalam suatu larutan elektrolit. Material yang memiliki beda potensial lebih kecil akan menjadi anoda dan akan mengalami korosi lebih cepat [7]. Oleh karena itu, pada penelitian ini penulis akan menganalisis pengaruh variasi arus terhadap sifat mekanik dan laju korosi pada pengelasan SMAW sambungan pelat baja A36 dengan baja SS400.…”

Section: Pendahuluanunclassified

Analisis Pengaruh Variasi Heat Input terhadap Uji Impact, Uji Metalografi, dan Laju Korosi pada Pengelasan SMAW Sambungan Pelat Baja A36 dengan Baja Structural Steel 400 (SS400)

Fazadima¹,

Pratikno²,

Ikhwani³

2022

JTITS

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Pengelasan marupakan metode penyambungan material yang sering digunakan pada kapal dan industri lepas pantai. Baja karbon rendah seperti baja A36 dan baja structural steel 400 (SS400) merupakan material yang sering digunakan dalam konstruksi kapal. Pada penelitian ini akan dilakukan analisis pengaruh variasi heat input pada pengelasan SMAW sambungan pelat baja A36 dengan baja structural steel 400 (SS400) terhadap uji laju korosi dan beberapa sifat mekanik seperti uji impact dan uji metalografi. Untuk variasi yang digunakan pada penelitian ini adalah heat input yaitu 1,08 kJ/mm, 1,26 kJ/mm, dan 1,44 kJ/mm. Dari pengujian impact didapatkan untuk nilai ketangguhan impact energy terbesar yaitu pada variasi heat input 1,44 kJ/mm sebesar 122 Joule. Pada pengujian makro metalografi, didapatkan hasil bahwa semakin besar heat input yang digunakan maka akan memiliki ukuran weld metal yang semakin lebar. Selain itu pada pengujian mikro metalografi didapatkan bahwa semakin besar heat input yang digunakan maka struktur mikro yang terbentuk akan semakin kasar. Sehingga akan menyebabkan nilai ketangguhan meningkat. Sementara pada pengujian laju korosi, didapatkan bahwa nilai laju korosi tertinggi yaitu pada spesimen dengan variasi heat input 1,44 kJ/mm yaitu sebesar 0,5386 mm/a.

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“…In addition, Zn is non-toxic and relatively cheap metal, and for these advantageous characteristics Zn has been used in Zinc-Air Batteries (ZAB) with seawater as an electrolyte (Yu et al, 2020) . The problem with Cu-Zn galvanic cells with the use of seawater is the corrosive nature of seawater (Thierry et al, 2016;Nejneru et al, 2019), leading to passivation of the Cu electrode due to the production of CuCl 2 deposit on the surface of the metal. The consequence is that the cell will lose its performance.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of Galvanic Cell with Silver Coated Cathode in One Compartment System Using Seawater as Electrolyte

Pauzi¹,

Samosir²,

Sulistiyanti³

et al. 2023

Sci. Technol. Indones

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This research was carried out to evaluate the electrochemical performance of a galvanic cell using seawater as an electrolyte. The cell was designed to have a volume of 200 mL and equipped with Zn as an anode and Ag-coated Cu as a cathode (Cu(Ag)-Zn system) in order to suppress the corrosion of Cu. As a comparison, the same experiment with the use of uncoated Cu as a cathode (Cu-Zn system) was also conducted. To conduct the experiment, a system was assembled by connecting 20 cells in series and placed in a closed container filled with seawater. The experiment was run for 72 hours, divided into three 24-hour cycles, by replacing the seawater every 24 hours. The performance of the system was evaluated in terms of open circuit voltage, close circuit voltage, current, light intensity, internal resistance, and power. The experimental results show that the corrosion rate of Cu coated with silver was smaller than that of uncoated Cu. Compared to the performance of the Cu-Zn system, it was also found that the Cu(Ag)-Zn system produced higher power and light intensity, which is in accordance with its smaller internal resistance. The overall experimental results indicate better performance of Cu(Ag)-Zn system and this better performance is attributed to the significantly lower corrosion rate of Cu(Ag) cathode which signifies the role of Ag layer to protect the Cu from attack by seawater. As a result, the Cu(Ag)-Zn system maintained the cathode corrosion rate with a ratio of 0.19. The percentage decrease of the OCV of the Cu(Ag)-Zn system was 6.14%, the CCV on the third day was 0.99%, the current was 36.68%, and the power was 37.83%.

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Studies on galvanic corrosion of metallic materials in marine medium

Cited by 7 publications

References 18 publications

Protection of Galvanized steel from corrosion in salt media using sulfur nanoparticles

Protection of Galvanized steel from corrosion in salt media using sulfur nanoparticles

Analisis Pengaruh Variasi Heat Input terhadap Uji Impact, Uji Metalografi, dan Laju Korosi pada Pengelasan SMAW Sambungan Pelat Baja A36 dengan Baja Structural Steel 400 (SS400)

Electrochemical Performance of Galvanic Cell with Silver Coated Cathode in One Compartment System Using Seawater as Electrolyte

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