scholarly journals Expired nizatidine drug as eco-friendly corrosion Inhibitor for alpha-brass alloy in aqueous solutions

2020 ◽  
Vol 61 (3) ◽  
pp. 192-209
Author(s):  
El-Sayed El-Aziz ◽  
Rashwan Mahmoud ◽  
Howaida Ibrahim ◽  
Ahmed Ezzat
Keyword(s):  
Aqueous Solutions ◽  
Corrosion Inhibitor ◽  
Brass Alloy ◽  
Alpha Brass

Microstructure and Texture Development in Alpha-Brass Using Repetitive Thermomechanical Processing

2018 ◽  
Vol 140 (2) ◽  
Author(s):  
Khaled Al-Fadhalah
Keyword(s):  
Thermomechanical Processing ◽  
Boundary Migration ◽  
Small Strain ◽  
Texture Development ◽  
Grain Boundary Migration ◽  
Compression Tests ◽  
Brass Alloy ◽  
Electron Backscattered Diffraction ◽  
Compression Strain ◽  
Alpha Brass

Repetitive thermomechanical processing (TMP) has been applied to evaluate the effect of compression strain and temperature on microstructure and texture development in an alpha-brass alloy. Two TMP schemes were employed using four cycles of low-strain compression (ε = 0.15) and annealing, and two cycles of medium-strain compression (ε = 0.3) and annealing. Compression tests were conducted at 25, 250, and −100 °C, while annealing was made at 670 °C for 10 min. Examination by electron backscattered diffraction (EBSD) indicated that the low-strain scheme was capable to increase the fraction of Σ3n boundaries (n = 1, 2, and 3) with increasing cycles, producing maximum fraction of 68%. For medium-strain scheme, a drop in the fraction of Σ3n boundaries occurred in cycle 2. Reducing compression temperature lowered the fraction of Σ3n boundaries for low-strain scheme, while it enhanced the formation of Σ3n boundaries for medium-strain scheme. Annealing textures showed that 〈101〉 compression fiber was strongly retained for samples processed by small-strain scheme, while weakening of 〈101〉 fiber accompanied by the formation of 〈111〉 recrystallization fiber occurred for the medium-strain scheme. The results indicate that the increase in strain energy stored during compression, via increasing strain and/or decreasing deformation temperature, is responsible to favor recrystallization twinning over strain-induced grain boundary migration (SIBM). Both mechanisms are important for the formation of Σ3n boundaries. Yet, SIBM is thought to strongly promote regeneration of Σ3n boundaries at higher TMP cycles. This is consistent with the development of microstructure and texture using small-strain scheme.

scholarly journals Tilia leafs as eco-friendly corrosion inhibitor for mild steel in aqueous solutions

2017 ◽  
Vol 58 (3) ◽  
pp. 271-282 ◽  
Author(s):  
El-Aziz Fouda ◽  
Abd El-Maksoud ◽  
Hosam Mostafa
Keyword(s):  
Mild Steel ◽  
Aqueous Solutions ◽  
Corrosion Inhibitor

Caffeine as non-toxic corrosion inhibitor for copper in aqueous solutions of potassium nitrate

2006 ◽  
Vol 253 (2) ◽  
pp. 566-571 ◽  
Author(s):  
Thuanny Fallavena ◽  
Muriel Antonow ◽  
Reinaldo Simões Gonçalves
Keyword(s):  
Aqueous Solutions ◽  
Corrosion Inhibitor ◽  
Potassium Nitrate

Production of Nano Leaded Brass Alloy by Oxide Materials

2009 ◽  
Vol 83-86 ◽  
pp. 36-40 ◽  
Author(s):  
Iman Farahbakhsh ◽  
S. Hadi Tabaian ◽  
J. Vahdati
Keyword(s):  
Milling Time ◽  
Argon Atmosphere ◽  
Reducing Agent ◽  
Oxide Materials ◽  
Brass Alloy ◽  
Closed Chamber ◽  
Mechanochemical Process ◽  
Oxide Powders ◽  
Lead Oxides ◽  
Alpha Brass

Mechanochemical process was applied for brass alloy production using chemical grade oxide powders. Alpha brass was produced when CuO, ZnO and PbO were milled under argon atmosphere in the presence of graphite (as reducing agent). Concurrent reduction of zinc, copper and lead oxides took place in the argon atmosphere, whereas the reactions of the reduction did not proceed well in the closed chamber that filled with air. These reactions were promoted by milling time up to 100 hours. The amount of reduction tends to decrease for longer times.

Sign in / Sign up

Export Citation Format

Share Document