Effect of the addition of oxo-anions on the corrosion and passivation of tin in synthetic industrial water

Investigation of the Effect of Natural Extract on Corrosion Behavior of Tin in Na2CO3 Solution

“…The same explanation is introduced by several authors [2,[21][22][23]. Dehydration of the thermodynamically unstable Sn(OH)4 leads to the stable SnO2 [24].…”

“…The working electrode was pure tin in a cylindrical shape with an exposed surface area of 0.5cm 2 . The samples was mechanically ground successively with 300, 800, and 1200 grit emery paper, degreased in acetone and rinsed with bidistilled water before immersed in the test solution.…”

“…The corrosion behavior of this metal in aqueous medium has been the subject of several investigators [1][2][3][4][5]. The use of pure tin is greatly restricted by its high fusibility, high price, low hardness, corrosion resistance, wettability and ease of forming alloys [6].…”

The Effects of Chloride and Sulphate Ions on the Electrochemical Behaviour of Tin in Aqueous Solutions

“…There is a general agreement that tin secondary passivation is due to the precipitation of a thin film of Sn(OH)4 which undergoes dehydration to yield a more stable film of SnO2 on the metal surface [7]. On the other hand, the passivation breaks down when the surface is exposed to corrosive solutions that contain aggressive anions, such as halides, sulphate, and others [13][14][15][16]. The objective of this work is to study the corrosion behaviour of pure tin in an aqueous solution simultaneously containing Cl -and SO4 2-ions, using electrochemical techniques, optical and scanning electron microscopy.…”

“…There are numerous studies on the corrosion effect of chloride and sulphate ions, and, in most studies, test solutions were prepared using these anions and ions of interest. Ait Addi et al [13] suggested that the corrosiveness of industrial water depends on the ratio of the concentration of Cl -and SO4 2-to HCO3 -, where Cl -and SO4 2-ions are aggressive ions, whereas HCO3 -ions have inhibitive properties. The anodic behaviour and corrosion of pure tin has been studied using electrochemical techniques under different experimental conditions.…”