Corrosion Behavior of Work Hardened SnPb-Solder Affected Copper in the Bay of Bengal Water Environment

Abstract

Copper and its alloys are extensively used in marine applications due to high corrosion resistant behavior. But the corrosion immunity of copper varies with the environmental factors especially the sea water ingredients. Many researchers investigated corrosion level of copper materials in different oceans/seas. Unfortunately, such study is missing in the Bay of Bengal water. Moreover, inclusion of alloying elements can have influence on the corrosion behavior of copper, especially the addition of SnPb-solder for repair works and environmental effects due to ageing. In fact, the urge of using old copper to manufacture new components for marine applications necessitates the characterization of various properties. In this context, present paper is an attempt to investigate the corrosion behavior of copper and solder affected copper to enhance the reuse potential of SnPb-solder affected old/waste copper in contact of the bay water along with comparison with commercial copper alloys. Here, the result shows that overall leaching is increased for the addition of Sn and/or Pb in Cu over the whole immersion period in the stagnant water of the Bay of Bengal. The highest loss is found to be of Cu-Pb alloy which is followed by SnPb-solder affected copper, then Cu-Sn alloy and the lowest loss is of pure copper. The cold-rolled work-hardening has reduced the corrosion rate for all copper alloys. It also reveals that the solder affected copper is more corrosion resistant than commercial copper alloys such as brass and bronze.

Corrosion Resistance of Scraped Copper in Velocity Varied Inland Water of Bangladesh

“…Once the patina is formed, the copper materials are shielded, causing a reduction in corrosion attack. This result matches with the results obtained from previous works of ongoing projects, i.e., the corrosion of copper-made heat exchanger tubes in the river and coastal water [8], Solder Affected Copper in the Bay of Bengal Water Environment [9], solder-affected copper in pH varied environments [10] and commercial copper alloys in seawater [18].…”

“…For instance, chemical or electrochemical corrosion reactions can vary due to variations in pH value, relative flow condition, thermal condition, and presence of certain elements/compounds in the vicinity of the reaction region. A good number of research works are guiding the search for further investigation on the corrosion of copper, especially scraped copper [8][9][10][11][12][13][14]. Copper also shows specific behavior of inter-granular stress corrosion cracking [15], and alloying elements affect copper corrosion [16].…”

Characterization on Specific Wear Rate of Al Composite Reinforced with nano-Al2O3 Using Taguchi’s Technique

“…The disc used for this experiment was of SS 309s material containing 60% Fe, 23% Cr, 14% Ni, 2% Mn, 0.84% Si, 0.08% C, 0.05% P, and 0.03% S as the counter-body. The hardness of the stainless steel disk was found on average as 168 HV made of stainless steel having a diameter of 0.049m [19]. The pin and disk weights were calculated using an electronic balance with a 0.001 mg accuracy for the wear test.…”

Impact of Deep Seawater on the Electrochemical Corrosion Performance of Hypoeutectic, Eutectic and Hypereutectic Al-Si Automotive Alloys

“…Seawater was collected from the Bay of Bengal, specifically from a point in Saint Martin Island with coordinates of 20°37′30′′N and 92°20′53′′E. The seawater had a density of 1.024 g/cm 3 and a pH of 7.14 [19]. Electrochemical glass cells were used for corrosion analysis, with three electrodes: a working electrode, a reference electrode, and a counter electrode.…”

“…But for deep seawater, a complex mixture contains different types of salts along with NaCl, dissolved inorganic and organic matter, and minor atmospheric gases. So, the corrosion behaviour must be different in the seawater environment for different types of automotive alloys [18,19].…”