Keywords : corrosion


The Atmospheric Corrosion of Carbon Steel and Cast Iron in the Environment of South Mosul

Nadum Ibrahim Naser

Al-Rafidain Engineering Journal (AREJ), 2014, Volume 22, Issue 3, Pages 165-175
DOI: 10.33899/rengj.2014.88211

Abstract
The carbon steel and cast iron are widely used metals in engineering and industrial applications. In this study, samples of carbon steel and cast iron chosen and distributed on six selected sites in the southregion of Mosul city in Iraq, Because these sites distinguished by the existence of natural emanations of hydrogen sulfide gas is produced and the existence of materials that cause metal corrosion like sulfates and chlorides. The corrosion measured by weight loss method according to the standard (ISO 9223:1992) and the higher rates registered in the sites that contain high emanations of hydrogen sulfide gas and sulfates and chlorides. In addition, it became obvious that there is a relationship between the corrosion exposure time and the corrosion rates which decreased by increasing of corrosion exposure time and continuous increasing in weight loss. The test continued for a complete year.

INFLUENCE OF THE FORMING PROCESSES ON THE RATE OF CORROSION OF GALVANIZED HIGH STRENGTH LOW ALLOY STEEL SHEETS

Dr. F. M. Abdulla; A. M. Ali; H. A. Ibrahim

Al-Rafidain Engineering Journal (AREJ), 2010, Volume 18, Issue 6, Pages 95-104
DOI: 10.33899/rengj.2010.34930

ABSTRACT:
The effect of deformation on the corrosion of galvanized high strength low alloy steel sheet is studied. Specimens in the uniaxial, plain and biaxial strains were stretched by a hemispherical punch to three different punch heights for each path of strain. After each deformation, The deformed specimens together with a fourth non deformed specimen were subjected to a corrosive medium for the same sequential times. To determine the effect of corrosion, all the specimens were weighted before and after each corrosion stage and the hardness was also measured It was found that corrosion in the deformed specimens was higher than in the non-deformed ones. Also it was found that corrosion increased by moving from the uniaxial to the biaxial strain passing through the plain strain path and by increasing the punch heights. The results were verified by the hardness measurement.

KEYWORDS: galvanized HSLA steel, corrosion, deformation, strain path