Temperature plays an important role in promoting the corrosion of metals. The Arrhenius plot can interpret the corrosion rate-temperature dependence, where the Arrhenius behavior gives a geometrical meaning and makes explicit a positive or negative linear dependence of charge transitivity and temperature. In addition, according to the Arrhenius interpretation, it represents the energy that the molecule in the initial state of the process must acquire before it can take part in the reaction, whether it is a physical, or a chemical process. Taking into account the deviation from the linearity, we have extended the Arrhenius-type expression by one term in 1/T2 and we have given some physical meaning to the new related coefficients for which it is found that they depend closely on the number of acid hydrogen atoms in the polyacid for the corrosion and passivation of the Nickel based metallic glass alloy of the composition Ni82.3Cr7Fe3Si4.5B3.2. Moreover, we can consider that the deviation to the Arrhenius linear behavior as a super-Arrhenius behavior In addition, a mathematical analysis of the trend of experimental scatter points of the charge transfer resistance with temperature permits us to reveal an interesting homographic behavior which leads us to suggest an original empirical model with only two optimal adjustable parameters, as well as a new pseudo-power dependence of the number of hydrogen atoms in the polyacid.

Thin films of Co and Ni electroplated onto a copper electrode from acidic sulfate and Watts baths, respectively, were investigated.

Nickel (Ni), cobalt (Co) and their alloy have been extensively employed in engineering due to their magnetic, chemical, mechanical, physical and electrocatalytic characteristics, which grant resistance against corrosion and heat. Electrodeposition is considered to be a significant and environmentally friendly technique for producing Ni, Co and their alloy coatings due to its promising properties. The current research provides a brief review of the latest studies of different types of Ni, Co, and Ni-Co alloy electrodeposition from different aqueous baths. This article reviews the effects of various organic additives in Ni, Co and their alloy electrodeposition processes. Due to the special functions of organic additives, they are widely used during electrodeposition. The additives usually affect the growth and crystal building of deposits through their adsorption on the cathode surface. The widened electrochemical window, superior thermal stability, negligible or low vapor pressure and the environmentally friendly characteristics of ionic liquids (ILs) permit them to be promising replacements for traditional, toxic and volatile organic solvents.