Finding the Weight Loss Rate of Metallic Surfaces Exposed To Corrosion Presence of Vibration (Corrosion - Vibration) | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 30, Issue 20, December 2012, Pages 448-462 PDF (539.74 K) | ||
| DOI: 10.30684/etj.30.20.14 | ||
| Author | ||
| Mouhmad Abdultef Ahmed | ||
| Abstract | ||
| In this research the structural steel type (A36) samples were prepared by traditional preparation operations , chemical composition of samples was analyzed , hardness tested, then testing corrosion was achieved for two major cases, a general corrosion case when the corrosive medium (sea water) is static for five days period ,and the second case is the corrosion with presence of mechanical vibration, which included two branch cases , first case; corrosion of vibrated samples with the vibrated corrosive medium, and the second case when the samples are fixed and corrosive medium is vibratory , a total test period is five hours for each case ,then found weight loss and the corrosion rate of all cases of corrosion mentioned by a traditional weight loss method , as well as study the microstructures before and after the corrosion cases and to find an experimental mathematical formula that illustrate the relationships between corrosion and corrosion with presence of vibration, note that the used device to study the mechanical vibration effect was locally designed and manufactured, according to the modified American Standard (ASTM G32).Observed that the weight loss and corrosion rate reached the highest value in the second case of corrosion with presence of mechanical vibration (fixed samples and corrosive medium is vibratory), followed by the first case of corrosion with presence of mechanical vibration (vibrated samples with the vibrated corrosive medium), and less the value of the corrosion rate and weight loss is the state of general corrosion (corrosion in the static medium). It was noted that the microstructure of the structural steel became uniformly corroded after general corrosion case (in static corrosive medium) and corrosion regions were spread or scattered over all parts of the sample surface on a regular basis, while the microstructure in the two cases of corrosion with presence of mechanical vibration containing irregular corrosion cavitations and scattered randomly on the surface, and more deeply especially the second case (fixed samples and corrosive medium is vibratory). Illustrated from the results and carves there was relationship between mentioned corrosion cases, it was an experimental mathematical formula: Acc.C.R.= Vib-C.R2 – ( Vib-C.R1 +Static C.R.) | ||
| Keywords | ||
| vibrocorrosion; vibration; corrosion; vibration and corrosion | ||
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