Removal of tarnishing and roughness of copper surface by electropolishing treatment

Study the Mettalic Finishing and Corrosion Control Processes for Carbon Steel over Head Pipes Using Polymer Molecules

“…Application of polymers additives on corrosion control of carbon steel pipes A pilot for distillation tower were used for this application .the overhead of this tower used to release hydrocarbons gases which are corrode the material of this overhead (carbon steel).So many different corrosion inhibitors were injected in this overhead and the efficiency of these corrosion inhibitors were evaluated by measured the Concentration of Fe +2 (ppm) in the sample that taken from a drain system. Concentration of Fe +2 (ppm) in case of presence and absence of polymers molecules were measured using Atomic absorption spectroscopy .we found that as concentration of polymers additives increases,the positively ferrous ions Fe +2 (ppm) will decrease as shown in Table ( 6 ) and Figure (9 ). So this effect will make the ability to control the corrosion in carbon steel and give an indication for these polymers as agood inhibitors.…”

“…Five different H 3 PO 4 concentrations were used, namely 4,6,8,10, and 12 M, all solutions were prepared using A.R grade chemical. Blank solution (8M H 3 PO 4 ) was prepared as well as in presence of different concentrations from the polymers in the range of concentration (100-800 ppm).…”

“…However steel suffers from corrosion in electrolytes because of the presence of cementite in its structure [3,4]. Cementite [Fe 3 C] which does not form solid solution with iron [Fe] and hence leads to steel corrosion through the formation of a multitude of microscopic galvanic cells of the type : Fe / Electrolyte /Fe 3 C (Cementite) To protect steel structures against corrosion different techniques are used such as cathodic protection, anodic protection, coating and the use of inhibitors [4][5][6][7]. Inhibitors are materials that may be injected into the system.…”

Parameters Selection for Electropolishing Process of Products Made of Copper and Its Alloys

“…Copper and brass elements are used for fittings, screw propellers, builders hardware, parts for pipes, water-sewerage systems, heating systems, cable clamps, terminal strips, parts of electrotechnics, matrices for typography production, music instruments, ammunition, jewellery and many others. Due to that, electropolishing is the key process of surface preparation [10,11].…”

Development and characterization of graphene-based electronic devices

“…Right before the growth process, an electropolishing treatment is performed [102]. For this purpose, the foil is cutted in 6 cm × 5 cm pieces, where a strip of 4 cm × 1 cm is partially liberated from a 5 cm side and twisted upwards to provide electrical contact to the sample.…”