Studying Copper Electropolishing Inhibition in Presence of Some Organic Alcohols

Abstract

Electro polishing is defined as anodic corrosion. The issue of the effects of corrosion on structural integrity of metal surfaces has been a question of concern for some time. The uses of chemical corrosion inhibitors are common in production and processing operations. Nevertheless, the challenge is to develop a new class of corrosion inhibitors to protect the materials, due to the economic importance of copper there are several researches deals with acceleration and inhibition of this process. In this paper the electropolishing process inhibited with different ratio by addition of some organic alcohols (methanol, ethanol,propanol, and isopropanol) by addition with concentration (2, 5, 10, 15, 20, 25 and 30 %) .The results reveal that these organic alcohols have a strongest inhibitive effect ranging from8. 7 -53.8 % and the thermodynamic parameters were present.

Preparation and Purification of a Flame-Retardant Polyphenylphosphonate Containing 4,4'-Dihydroxybenzophenone

“…26 It is believed that the appearance of local breakdowns is most probable when the potentials correspond to the oxygen release onset. 21 However, in the case of the anode polarization in phosphate solutions the local corrosion is often observed prior to the achievement of the critical potential that can be caused by the local disintegration of the passive film continuity. 32,33 The most widely spread theory that explains the effect of electrochemical polishing is the theory of the film passivation, 10 according to which the anode surface consists of active convex sections and passive concave sections.…”

“…The electrolytes with organic additives, in particular alcohols, amines, amides and carbonic acids are more popular. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] The researchers accumulated a huge data array relating to the studies of the properties of such electrolytes, including adsorption properties and the copper dissolution kinetics. Many organic substances have surface-active properties and therefore they provide a high quality of the copper treatment.…”

Establishing the patterns in anode behavior of copper in phosphoric acid solutions when adding alcohols

“…Many studies focused on instructions about the favorable impact of adding certain organic compounds (carboxylic acids or their salts, aldehydes, amines, alcohols) on the process of electrochemical polishing of copper in phosphoricacid solutions [7][8][9][10][11][12][13][14][15][16][17]. The most commonly used as additives are the saturated, unsaturated and aromatic alcohols whose introduction reduces the limiting current density, prevents point etching and metal etching.…”

“…For example, the positive effect is observed when adding to phosphoric-acid solutions glycerin and organic acids [11], ethanol, ethylene glycol or glycerol [12], methanol [13,14], which ensures the uniform dissolution of metal at polishing, decreases the number of etching points and reduces the limit anode current. The influence of additives of aromatic alcohols during copper electropolishing in H 3 PO 4 solutions was investigated in [15].…”

“…Thus, the cited studies highlight only specific cases of copper polishing regarding the treatment of products in electronic industry [11,14], the adsorption phenomena when investigating corrosion processes on copper [13,15]. Of interest is the research aimed at establishing the influence of additives of alcohols on the technical indicators of polishing process, such as the relative smoothing of surface unevenness, coefficient of reflectance, specific metal removal.…”