Corrosion and Corrosion Control

Accelerated Degradation Behavior and Cytocompatibility of Pure Iron Treated with Sandblasting

“…37,38 Especially, for sandblasted samples, there is a peak at 2880 cm -1 which is attributed to silicon carbide. Typical corrosion product layers of iron are composed of iron oxides and hydroxides; 39 however, in this case no clear signals derived from these species can be distinguished. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 All samples after immersion are covered by corrosion product layers, and show a similar surface morphology which is rough and loose (Fig.…”

Electrostatic Corrosion Analysis with Damaged Passive Film Model of Stainless Steel

“…When the applied stress increases, the area of damaged surface also increases. Since the standard electrode potential of a steel without passive film is lower than the intact stainless steel [1], the increase in the damaged area leads to a decrease in the averaged potential of the whole surface. This is the reason why the spontaneous potential decreased as the applied stress increased in the above-mentioned experiment.…”

“…If the film is damaged by some reason, it can be immediately and automatically reproduced unless the surface is prevented to react with oxygen in ambient air or noncorrosive solutions. However, when the stainless steel is subjected to a stress in a corrosive environment, a mechanical damage of passive film is caused by a microscopic plastic deformation around the grain boundaries, which cannot be repaired due to the existence of active anions such as chlorine ion in an electrolyte solution that prevent the regeneration of oxide film [1]. Consequently, the corrosion develops selectively on the damaged portion and leads to a pitting corrosion and finally causes a stress corrosion cracking (SCC).…”

“…Austenitic stainless steel is a superb material which has a superior corrosion-resistance and high fracture toughness. The corrosion-resistance arises from the passive film made of chromium oxide or chromium hydrated oxide [1]. If the film is damaged by some reason, it can be immediately and automatically reproduced unless the surface is prevented to react with oxygen in ambient air or noncorrosive solutions.…”

Investigate the NPK Agriculture Fertilizer as a Corrosion Inhibitor for Mild Steel in an Iraqi Crude Oil Refinery Tank

“…7 Such additives can be organic or inorganic inhibitors, as what was reported in different articles in the literature. 8,9,[10][11][12][13][14][15] Multiple studies have reported that inhibitors containing particular atoms, such as Nitrogen, Sulphur, and Oxygen act as good corrosion inhibitors. This is due to the ability of these atoms to adsorb on the surface of the steel and thereby forming a coordinate bond between the unpaired electrons present on such atoms and vacant d-orbitals located in mild steel.…”