Mechanical surface treatments effects on corrosion of AISI 316 Ti stainless steel in chloride environments

Abstract

The current paper investigates effects of various surface treatment techniques such as grinding, garnet blasting, and shot peening on the corrosion rate and behavior of austenite stainless steel of type AISI 316 Ti. The exposure to different corrosive solutions usually accompanying the coastal and industrial environments (sodium chloride and ferric chloride), as well as a combination of the two was considered. The corrosion behavior of AISI 316 Ti under these test conditions was investigated using immersion tests and electrochemical impedance spectroscopy together with optical scanning electron microscopy, in order to observe and to assess the changes in the surface configuration and topography such the shapes, distribution, and dimensions of the resulting pits. The presented results clearly show the relatively higher corrosive effect of ferric chloride, and the increased corrosion rate under greater surface roughness values, which imply greater real surface area and capillarity effects.

Effects of immersion in the NaCl and H2SO4 solutions on the corrosion rate, microstructure, and hardness of stainless steel 316L

“…Firstly, 100 mL of NaCl and H2SO4 solutions with the same molar concentration (0.017 M) were prepared in a different compartment. After that, a rectangular shape of SS 316L was prepared with a dimension of 20 mm x 10 mm x 2 mm and hanged with a inert rope [38,39]. Fig.…”

“…Then, the SS 316L plates were immersed in both solutions and were left for three days. After three days, the SS 316L samples were taken from the solution and washed with DI water to clean the spent solution [37,39]. The cleansed samples were dried in an oven for four hours until they were completely dried.…”

Corrosion Resistance of AISI 316Ti Stainless Steel Subjected to Shot Peening with and without Pickling in Various Chloride Environments

“…This proves that pickling affects the protective effectivity of the passive layer. In comparison with the ground surface according to [23,24], the measured electrochemical characteristics were worse. According to the potentiodynamic cyclic test results a positive effect of pickling is visible on the tested surfaces.…”

Magnetorheological finishing of small gear teeth profiles using novel workpiece fixture

“…It's hard to polish small gears in a traditional method. Conventional polishing methods, including as honing, lapping, grinding, and buffing, are not always effective at generating the detailed, precise results that are often required, such as in the case of complex 3D components, freeform shapes, and uneven structures (Alaskari et al, 2014). The different material properties like yield strength, wear, and corrosion resistance can be improved by super finishing.…”