Anticorrosion properties of momilactone A isolated from rice hulls

Silicon tetrachloride, used in industry for the production of highest purity silicon and silica, is customarily manufactured from silica-sand and charcoal.SiCl4 can also be made from rice hulls, which contain up to 20 percent silica and only traces of other mineral matter. Hulls, after carbonization, actually prove superior as a starting material since they react at lower temperature. This use of rice hulls may offer a new, profitable solution for a rice mill byproduct disposal problem.In studies of the reaction kinetics with carbonized hulls, conversion of SiO2 to SiCl4 was found to proceed within a few minutes to a constant, limited yield which depended reproducibly on the ambient temperature of the reactor. See Fig. 1. This suggested that physical or chemical heterogeneity of the silica in the hull structure might be involved.

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Thermal characteristics of rice hulls

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.280310185 ◽

1981 ◽

Vol 31 (1) ◽

pp. 624-626 ◽

Cited By ~ 19

Author(s):

M. A. Hamad

Keyword(s):

Thermal Characteristics ◽

Rice Hulls

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Study of operating properties of aanticorrosion packing papers

Ferrous Metallurgy Bulletin of Scientific Technical and Economic Information ◽

10.32339/0135-5910-2020-10-1021-1027 ◽

2020 ◽

Vol 76 (10) ◽

pp. 1021-1027

Author(s):

A. P. Ponomarev ◽

L. G. Kolyada ◽

E. V. Tarasyuk

Keyword(s):

Steel Strip ◽

Low Carbon Steel ◽

Strength Characteristics ◽

Low Carbon ◽

Operating Characteristics ◽

Packing Materials ◽

Accelerated Corrosion ◽

Operating Properties ◽

Deformation And Strength Characteristics ◽

Anticorrosion Properties

Metal products are subjected to atmospheric corrosion during transportation and storing. An important way to prevent this negative phenomenon is application of special packing materials, in particular materials, containing volatile inhibitors of corrosion, which protect metal against various corrosion agents. To protect metal effectively it is necessary to provide a definite level of operating characteristics of packing materials. The purpose of the work was the study of operating properties of inhibited crepe, inhibited and laminated polyethylene film, inhibited crepe and reinforced by polypropylene web papers, manufactured by OJSC “PP TechnoKhim”, Magnitogorsk, used for packing of metals. Structural and dimensional, sorption, deformation and strength characteristics, of the studied anticorrosion papers are presented, the characteristics being calculated based on the results of measurements. To determine their physical-mechanical and anticorrosion properties, standard methods and methodologies were used. To evaluate impact of moisture and transportation conditions, indices of water adsorption and wear of the studied papers were determined. Inhibitor content in these materials was determined by thermogravimetric analysis method. Their protective ability was studied on samples of low carbon steel strip. For accelerated corrosion tests the strip samples were degreased by alcohol, dried in air and packed in the studied anticorrosion papers, after that they were exposed under increased temperatures and moisture conditions. It was determined, that among the materials under the study, the inhibited crepe paper, reinforced by polypropylene web, hhas the best complex of physical-mechanical and anticorrosion properties. It provides a higher level of prevention corrosion of metal l and surpasses other materials in a number of deformation and strength characteristics. Recommendations were proposed to improve qquality of produced anticorrosion papers.

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Low-temperature composite lubricants with anticorrosion properties, based on compounds of closo-borate anions [BnHn]2- and ammonio-derivatives [BnHn-1NH3] - (n = 10, 12) of them

Chemical Engineering ◽

10.31044/1684-5811-2018-19-14-667-672 ◽

2018 ◽

Keyword(s):

Low Temperature ◽

Anticorrosion Properties

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Anticorrosion properties of manganese-containing complex oxides, obtained by stoneware method

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/905/1/012051 ◽

2020 ◽

Vol 905 ◽

pp. 012051

Author(s):

E A Nurislamova ◽

M R Ziganshina ◽

S N Stepin ◽

V A Mendelson

Keyword(s):

Complex Oxides ◽

Anticorrosion Properties

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The Impact of Heat Treatment on the Behavior of a Hot-Dip Zinc Coating Applied to Steel During Dry Friction

Materials ◽

10.3390/ma14030660 ◽

2021 ◽

Vol 14 (3) ◽

pp. 660

Author(s):

Dariusz Jędrzejczyk ◽

Elżbieta Szatkowska

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Friction Coefficient ◽

Dry Friction ◽

Zinc Coating ◽

Pin On Disc ◽

The One ◽

The Impact ◽

Coating Hardness ◽

Anticorrosion Properties

The analyzed topic refers to the wear resistance and friction coefficient changes resulting from heat treatment (HT) of a hot-dip zinc coating deposited on steel. The aim of research was to evaluate the coating behavior during dry friction after HT as a result of microstructure changes and increase the coating hardness. The HT parameters should be determined by taking into consideration, on the one hand, coating wear resistance and, on the other hand, its anticorrosion properties. A hot-dip zinc coating was deposited in industrial conditions (according EN ISO 10684) on disc-shaped samples and the chosen bolts. The achieved results were assessed on the basis of tribological tests (T11 pin-on-disc tester, Schatz®Analyse device, Sindelfingen, Germany), microscopic observations (with the use of optical and scanning microscopy), EDS (point and linear) analysis, and microhardness measurements. It is proved that properly applied HT of a hot-dip zinc coating results in changes in the coating’s microstructure, hardness, friction coefficient, and wear resistance.

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