Galvanic corrosion of copper-base alloys in contact with molybdenum-containing stainless steels in Arabian Gulf water

Hossani, H.I. Al; Saber, T.M.H.; Mohammed, R.A.; Din, A.M. Shams El

doi:10.1016/s0011-9164(97)00050-7

Cited by 20 publications

(6 citation statements)

References 15 publications

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“…This attributed to the instability of the film freely formed on the copper under conditions of galvanic coupling. This result is in agreement with previous observations [20] for steel and 70/30 Cu-Ni alloy couple in sea water. This figure reveals that the nickel-chrome alloy is the anode because its corrosion potential is more negative than the copper.…”

Section: Results and Discussion 31 Free Corrosionsupporting

confidence: 94%

Galvanic Corrosion of Copper / Nickel-Chrome Alloy in an Agitated Sulfuric Acid Solution

Hussein¹,

Hasan²,

Al-Haboubi³

2018

NJES

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Galvanic corrosion of Nickel-Chrome alloy (NiCr alloy) and Copper (Cu) coupled in 5% sulfuric acid solution was investigated. The effects of agitation velocity, temperature, and time on the galvanic corrosion current and the weight loss of both metals in both free corrosion and galvanic corrosion were investigated. The trends of open circuit potential (OCP) of each metal and galvanic potential (Eg) of the couple were also determined. The results showed that Cu was cathodic relative to Ni-Cr alloy in galvanic couple and the corrosion potential of the couple (Ni-Cr alloy /Cu) was between the values of the two single components because the OCP of copper shifted to positive with the increase in velocity. Under stagnant conditions initially the galvanic current was more negative then shifted to the positive with time. The corrosion of Ni-Cr alloy decreased with time because the passivation layer was formed on the surface. Under flow conditions, the galvanic current sharply shifted to the negative direction (increase galvanic current from Ni-Cr alloy (anode) to Cu (cathode) during the first few minutes.

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Section: Results and Discussion 31 Free Corrosionsupporting

confidence: 94%

Galvanic Corrosion of Copper / Nickel-Chrome Alloy in an Agitated Sulfuric Acid Solution

Hussein¹,

Hasan²,

Al-Haboubi³

2018

NJES

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“…Mengingat jenis lingkungan dan kelas baja yang bervariasi maka logam harus dipilih dengan tepat . Stainless Steel mungkin yang paling banyak digunakan, karena mengandung 2-3 wt.% Mo dengan melting point 2.622 °C dan penghalang korosi chrome disintegrasi dalam keadaan yang sangat merusak [29][30][31]. Perubahan temperature pada lingkungan laut menjadi salah satu pemicu korosif.…”

Section: Pendahuluanunclassified

“…Mereka menemukan temperature suhu 20 o C meningkatkan korosi secara signifikan dengan 71% lebih tinggi dari suhu 5 o C. Dapat disimpulkan bahwa setiap kenaikan suhu korosi material mengalami perkembangan lebih cepat kurang lebih setiap kenaikan suhu 5 o C korosi berkembang 3 kali lipat. Penelitian Hossani et al [39,40], memperlihatkan kontak antara baja dan paduan tembaga dalam Teluk Arab mengalami serangan besar dari laju korosi galvanic dengan kenaikan suhu mencapai 50 o C. Terlepas dari semua temuan ini, tidak ada studi ditemukan yang mengambil dampak baik dari perubahan suhu lingkungan laut antara paduan logam dan baja tahan karat menjadi pertimbangan.…”

Section: Pendahuluanunclassified

STRESS CORROSION CRACKING SAMBUNGAN LAS CDW SS 316L DAN ASTM A36 DALAM VARIASI SUHU LINGKUNGAN KOROSIF FeCl2

Saputra

Gapsari²,

Darmadi³

2023

JRM

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Stress Corrosion Cracking (SCC) is known as a trigger for material failure, especially in Dissimilar Metal Welding (DMW). Although DMW promises wide application in structural design, it is found that there is high SCC mitigation making it prone to failure. Capacitor Discharge Welding (CDW) is one of the best dissimilar metal welding methods. This article observes the weld joints of CDW ASTM A36 and SS 316L against the phenomenon of SCC in a corrosive environment temperature variation of FeCl2 0.5 Molar (30, 40, and 50 0C). The results of the Constant Load Test (CLT) show that the welding threshold strength has decreased significantly due to the increase in the galvanic corrosion current which increases at high temperatures. The stress threshold of specimen T1 with a temperature variation of 30 0C K1cc 360 MPa, the specimen T2 produces a threshold of 216 MPa and the specimen T3 with 144 MPa. It can be concluded that changes in the temperature of the corrosive environment accelerate the galvanic reaction which accelerates the occurrence of corrosiveness in the weld joint. SEM/EDS photo evaluation provides a perfect picture of the corrosive distribution of the fracture surface. At the highest temperature of 50 0C, the surface corrosive rate causes a lot of bubbles and porous pores in the weld fracture, this causes the connection threshold stress to weaken.

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“…Studies in aqueous environment have shown that there are many factors that can influence galvanic corrosion, such as the properties of the metal itself (potential difference between metals, polarization resistance [24], the stability of the passive film, etc. ), geometric properties (galvanic couple of area ratio between cathode and anode [25,26], the distance between electric dipoles [27,28]), and environmental factors (the flow velocity of the medium [25,29,30], dissolved oxygen [31,32], pH [33] and temperature [34][35][36]). In addition, organisms and some organic substances in the environmental medium will also affect the galvanic corrosion [37,38].…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion Behavior of Copper–Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution

Fan

Chen

Lin

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The influence of pH and metallographic structure on the corrosion behavior of copper-drawn steel is studied with the simulated system. The effect of pH on the corrosion behavior of copper-drawn steel has been investigated using open-circuit potential, potentiodynamic polarization, galvanic current measurement, scanning electron microscopy and scanning vibrating electrode technique techniques. The steel is corroded as anode, while the corrosion of copper plate is protected as cathode. All the results revealed that pH and metallographic structure had a significant influence on the corrosion behavior of copper-drawn steel. With the decrease in pH value from 6 to 2.4, the corrosion rate of copper-drawn steel galvanic couple (Cu-Fe GC) obviously increased in the simulated solution of acidic red soil. The electric field formed by the Cu-Fe GC changes the direction of ion migration between the copper and drawn steel electrodes, which impacts the composition and microstructure of corrosion products formed on the electrode surface.

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Galvanic corrosion of copper-base alloys in contact with molybdenum-containing stainless steels in Arabian Gulf water

Cited by 20 publications

References 15 publications

Galvanic Corrosion of Copper / Nickel-Chrome Alloy in an Agitated Sulfuric Acid Solution

Galvanic Corrosion of Copper / Nickel-Chrome Alloy in an Agitated Sulfuric Acid Solution

STRESS CORROSION CRACKING SAMBUNGAN LAS CDW SS 316L DAN ASTM A36 DALAM VARIASI SUHU LINGKUNGAN KOROSIF FeCl2

Galvanic Corrosion Behavior of Copper–Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution

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