material-science-2019-accepted-abstracts

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Journal of Materials Science and Nanotechnology | Volume 3

February 25-26, 2019 | Paris, France

Materials Science and Engineering

International Conference on

Comparison of corrosion behavior and effects of corrosion on TMT and 60 grade steel bars

Kazi Faiza Amin

and

Humayra Bushra

Bangladesh University of Engineering and Technology, Bangladesh

teel reinforcement bars are used extensively in construction

industries. Bars used in underwater or marine structures

are subjected to corrosion which can change the properties

of the reinforcement over time. Thermo-Mechanically Treated

(TMT) bars have gained popularity in the recent decades in

construction industries. Corrosion behavior of the TMT steel

bars and 60 grade steel bars were studied by accelerated

corrosion test by impressing a DC voltage between steel bars

(anode) and Stainless Steel plates (cathodes) in a 5% NaCl

bath for specific time periods ranging from 10 minutes to 40

minutes at an interval of 10 minutes and one at 135 minutes.

The samples were tested to determine the effect of corrosion

time on weight loss, corrosion rate, mechanical properties,

fracturemode andmicrostructure. Both types of steel exhibited

decreasing corrosion rate with time but the TMT steel exhibited

a greater weight loss and corrosion rate than the 60 grade

steel. TMT steel lost a significant amount of the outer case

with increased corrosion time. The microstructures of both of

the steels were unchanged after corrosion. The effects on the

mechanical properties and fracturemodewerenot significant at

such corrosion time. Corrosion tests with longer time duration

are needed to observe the effects on themechanical properties