Yu. A. Puchkov

A system of computer-aided methods for investigating electrochemical corrosion

A system based on P5827 and P150 potentiometers and an IBM PC is considered that makes it possible to investigate electrochemical corrosion of metals and alloys. The system can be used for training students and specialists as well as for corrosion investigation, testing, and certification. The software developed can be used in systems for corrosion protection and cor.

Structure and Corrosion Resistance of Welded Joints of Alloy 1151 in Marine Atmosphere

The corrosion behavior of joints formed by TIG and IMIG welding from clad sheets of heat-hardenable aluminum alloy 1151 of the Al – Cu – Mg system is studied. The corrosion tests are performed in an aqueous solution of NaCl in a salt-spray chamber. The welded joints are subjected to a metallographic analysis.

Influence of tensile stresses on the corrosion resistance of titanium alloy VT22 in aqueous solution of NaCl

How tensile stresses and pH value influence the passivation, corrosion, and structure of a protective film of two-phase titanium alloy VT22 in 3% solution of NaCl is investigated with the help of potentiometry, potential and dynamical analysis, and electrical and chemical impedance spectroscopy. We simulate the process of electrical transfer through the protective film and we reveal that its structure is two-layered. The film consists of a layer based on titanium hydroxide under which there is a titanium oxide layer adjacent to the alloy and primarily it protects the alloy against corrosion. How tensile stresses and pH value influence the hydrogen saturation process and delayed fracture of titanium in an aqueous NaCl solution is investigated.

Use of the Theory of Hardening Factor for Predicting the Properties of Articles from Heat-Hardenable Aluminum Alloy V91

The effect of modes of quenching cooling on the structure and corrosion resistance of heat-hardenable aluminum alloy V91T3 of the Al – Zn – Mg – Cu system is studied. Experimental data are used to plot the “temperature – hardness” and “temperature – time – corrosion rate” diagrams, which make it possible to predict the corrosion resistance of alloy V91T3 for various modes of quenching cooling. Equations relating the mass corrosion factor and the rate of pitting corrosion to the values of the hardening factor are suggested. The data obtained are used for predicting the phase composition and properties of component parts of a fabricated press mold.

Corrosion Properties of Diffusion Coatings under the Conditions of Cathode Protection.

ConclusionsWe have developed a computational-experimental model for determining the parameters of the corrosion process under the conditions of cathode protection, which allowed us to establish that the cathode protection substantially reduces the losses to corrosion in carburized, nitrided, diffusion calorized, and chromized coatings.

Structure and properties of amorphous and nanocrystalline chromium-carbon coatings

Amorphous and nanocrystalline chronium-carbon coatings have higher properties than standard galvanic chromium ones. However, data on these coatings, and their heat-treatment regimes are quite scarce. The present paper concerns the structure, microhardness, ductility, adhesion strength, and resistance to overall and pitting corrosion of amorphous chromium-carbon coatings deposited galvanically by various regimes in an electrolyte based on chromic anhydride with an additive of formic acid.