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Two separate stages are discernible as essential requirements in mitigating the effects of corrosion. Firstly, the right conditions must be created for effective protection, and secondly surfaces must be treated with the best available anti‐corrosion methods.

The rust inhibiting characteristics of barium/calcium petroleum sulphonates, prepared from two indigenously available base stocks of different origin have been determined in concentration ranging from 0.5 to 3.0% W/W in mineral oil as per ASTM D‐1748 method. The products have been characterised as ‘outstanding’, ‘good’ and ‘satisfactory’ on the basis of their performance in the humidity cabinet. It has been observed that Ba/Ca petroleum sulphonates possessing outstanding rust inhibiting characteristics show low oil/water interfacial tension and high water solubilization characteristics as compared to other sulphonates. It has also been observed that the rust inhibiting characteristics are profoundly influenced by the structural parameter of the hydrocarbon portion of the petroleum sulphonates. The larger the alkyl side chain, the better is the rust inhibiting properties.

When replacing a complex component formulation of the company’s premium industrial EP gear oils, a suitable additive pack was selected based on extended EP and other tests, and critical applications were identified. To satisfy the most critical application, a number of laboratory tests were done, using various combinations of additives, followed by a field trial. This paper describes some of these laboratory tests, e.g. rust tests. The final product was tried and accepted by the customer replacing the old well‐proven formulation.

This paper reviews the performance features of a new generation of industrial gear oils, developed for both mineral and synthetic base oils. These new products were designed to provide the highest levels of protection against the relatively new wear mechanism called micropitting. However, great stress was placed on providing these new products with balanced performance capabilities, so that they will perform with high reliability in the wide variety of conditions to which modern industrial gear oils are exposed. Performance areas such as filterability, foam control, corrosion protection, water separation, oxidation control and bearing protection were of particular concern. This paper compares the overall performance of these new technologies with conventional commercial products and it describes the extensive rig and field‐testing used to confirm their performance. It also reviews the phenomenon of gear micropitting and optimum methods for its assessment.

OF the whole range of metal rolling operations, almost the only section in which rolling oils are normally employed is in the cold rolling of flat material in plain cylindrical rolls. The metal for cold rolling has usually first been hot rolled in plain cylindrical rolls, but only in a few cases are rolling oils used in the hot rolling operation. These exceptions are referred to when considering the particular metals.

GERMANY Electropolishing of high carbon steels. The electropolishing of carbon steels of varied carbon content and of different heat treatments was undertaken with two standard electrolytes (sulphuric and phosphoric acids and without dextrin). Results were satisfactory as regards gloss, reflectivity and consistency. The same tests were repeated with a modified standard bath under varying conditions. After only a few trials quite glossy surfaces were obtained, which remained free from corrosive elements due to etching.— (S. Acemovic, Werks. u. Korr., 1959 (6), 373–375.)

In the late 19th century, work attributed to a Mr F. W. Taylor showed that water flooding a cutting area permitted a great increase in cutting speeds. Prior to this cutting was performed dry, at very slow speeds, but it was found that water gave an easier removal of swarf, enabling the cutting speed to be increased by some 40 to 50%. Water, obviously, gave rise to the problems of corrosion.

Non‐Soap Thickened Greases During the same period in which synthetic fluids were produced and quite widely used in lubricating greases—roughly over the last twenty‐five years—chemists also explored the field of non‐soap thickeners. The result of this work has been the successful production of certain types on a commercial scale, and this type of material has undoubtedly provided lubricants of a special nature which find considerable application, particularly under conditions involving high temperature.

The purpose of this paper was to perform an experimental investigation to analyze vibration and noise of unloaded gearbox with different oil quality. All motor-driven machinery used in the modern world can develop faults. The maintenance plans include analyzing the external relevant information of critical components, in order to evaluate its internal state. From the beginning of the twentieth century, different technologies have been used to process signals of dynamical systems.

A proposed neural network (NN) is also employed to predict vibration parameters of the experimental test rig. Moreover, four types of oils are used for gearbox to predict reliable oil. Vibration signals extracted from rotating parts of machineries carry lot many information within them about the condition of the operating machine. Further processing of these raw vibration signatures measured at a convenient location of the machine unravels the condition of the component or the assembly under study. The experimental stand for testing an unloaded gearbox is composed by actuated direct current (DC) driving system.

This paper deals with the effectiveness of wavelet-based features for fault diagnosis of a gearbox using two types of artificial neural networks (ANNs) and stress analyzed with computer-based software ANNs. The results improved that the proposed NN has superior performance to adapt experimental results.

This paper is one such attempt to apply machine learning methods like ANN. This work deals with extraction of wavelet features from the vibration data of a gearbox system and classification of gear faults using ANNs.

These kind of NN-based approaches are novel approaches to predict real-time vibration and acceleration parameters of unloaded gearbox with five types of oils. Also, the investigation contains new information about studied process, containing elements of novelty.

The purpose of the investigation was to research the corrosion resistance of water‐cooled rebar quenched in a novel agent (CQ) named CQ‐cooled rebar.

Water‐cooled rebar was quenched in CQ about 1 s, then cooled in air. The corrosion resistance of water‐cooled rebar and CQ‐cooled rebar was evaluated by atmospheric exposure (AE) and wet/dry cyclic accelerated corrosion tests (CCT). The electrochemical properties of the two rebar scales were researched using electrochemical tests, and their compositions and structure were examined using XRD, SEM and FT‐IR.

The corrosion tests showed that the corrosion resistance of CQ‐cooled rebar was better than that of water‐cooled rebar. The electrochemical tests indicated that the CQ‐cooled rebar scale had a higher corrosion potential, a lower corrosion current density and a higher polarization resistance. The thickness of the scale was 56 μm for CQ‐cooled rebar, and 29 μm for water‐cooled rebar. The phase constitution of the two scales comprised Fe₂O₃, Fe₃O₄, 2FeO · SiO₂ and FeO, but the mass ratio of Fe₂O₃ and Fe₃O₄ to 2FeO · SiO₂ and FeO, called protective ability index of the scale (PAIS), changed from 0.45 for water‐cooled rebar to 24 for CQ‐cooled rebar.

The results clarified the role of CQ‐quenching in improving the corrosion resistance of water‐cooled rebar, which was to generate thick and compact Fe₃O₄ and Fe₂O₃ layers over the rebar substrate, and retard the anodic dissolution and cathodic hydrogen evolution reaction.