• Journal of the Korean Electrochemical Society
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• v.11 no.3
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• pp.184-189
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• 2008

Inhibitive effects of chromate, phosphate, sulfate, and borate on chloride pitting corrosion of Al have been investigated using cyclic voltammetry. During the anodic oxide growth, the critical concentration of chloride for pit initiation decreased in the order: chromate > phosphate > sulfate > borate, and the maximum pitting current density increases in the reverse order: chromate < phosphate < sulfate < borate. The decreasing pitting current density was observed in the successive polarization cycles, which was attributed to the aging of Al oxides and field relaxation at oxide/solution interface.

• Journal of the Korean Chemical Society
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• v.56 no.1
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• pp.47-53
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• 2012

We have investigated the growth kinetics and electronic properties of passive film of zinc in borate buffer solution. The oxide film formed in passivation process of zinc has showed the electronic properties of n-type semiconductor based on the Mott-Schottky equation. And it was found out that the oxide film consisted ZnO and $Zn(OH)_2$ was composed of deep and shallow donors.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.8 no.1
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• pp.91-96
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• 1998

An empirical relationship which can be calculated to the lattice constants $a_0$ and $c_0$ for the borate crystals with huntite structure were determined. Different compositions of twenty-eight were used for the calculations. These empirical formulas can be used to predict lattice parameters of unknown compositions as a function of the average ionic radii in the trigonal and octahedral sites of the huntite structure.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2001.11a
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• pp.374-379
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• 2001

Tribochmical behaviors of a borate of triethanolamine in water solution were evaluated using a four-ball wear tester. X-ray photoelectron spectroscopy (XPS) was employed to study tribochemical species on worn scars of steel balls. Results show that a thick deposit layer was produced on the worn scars, which came from the decomposition of the borate. The surface film on the worn scars was mostly consisted with H$_{3}$BO$_{3}$, B$_{2}$O$_{3}$ and large amounts of ferricyanides.

• 한국전기화학회:학술대회논문집
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• 2001.04a
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• pp.21-21
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• 2001

• Proceedings of the Korean Ceranic Society Conference
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• 2003.04a
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• pp.19.1-19
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• 2003

• Proceedings of the Korean Society of Laser Processing Conference
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• 2005.06a
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• pp.26-31
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• 2005

• Journal of the Korean Society of Safety
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• v.23 no.4
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• pp.99-104
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• 2008

In this research, magnesium hydroxide as a flame retardant agents and zinc borate as a synergist were mixed with LDPF/EVA blended samples, in order to improve their flame retardancy. We attempted to select the best mixing ratio of the LDPF/EVA blend and the optimum amount of magnesium hydroxide and zinc borate by the comparison and analysis of the flame retardancy, the electrical properties such as the volume resistivity and dielectric loss tangent, and the mechanical properties such as the tensile strength and elongation at break. Particularly, specimen which is the 6phr of zinc borate and 10phr of magnesium hydroxide 70/30phr adding to the LDPF/EVA blended samples has been most excellent in flame retardancy and electrical/mechanical properties.

• Journal of the Korean Wood Science and Technology
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• v.33 no.4 s.132
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• pp.38-44
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• 2005

This study was carried out to investigate the combustion characteristics of flame retardant treated wood by water-soluble flame retardants which are made from mixture of aqueous solution of monoammonium phosphate, sodium borate and zinc borate. The combustion characteristics for flame retardant treated wood were carried out using thermal analysis (TGA, combustion heat) and flame retardant test (LOI, flame propagation). The results of thermal analysis and flame retardant test are as follows; 1) The sample treated by F4 showed excellent flame retardant effects in almost all of combustion characteristics. 2) From TGA curves, all the samples undergo pyrolysis and oxidation in two main discrete steps. 3) The effect of flame retardant for softwood is higher than those for hardwood, and the combustion heat has decreased with increase of the content of flame retardant. 4) LOI values are almost similar in flame retardant treated wood samples. The range of LOI is from 24 to 30. However, these values are much higher than LOI value of non-treated wood sample. 5) The blended aqueous solution had a final in the range of about pH 8.4, and a slight odor of ammonia.

• Economic and Environmental Geology
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• v.47 no.5
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• pp.541-549
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• 2014

The annual borate production in Turkey is about 3 million tons, which occupies approximately 61 percent of total annual world production. Turkey has five boron deposits including Bigadic, Emet, Kestelek, Kirka, and Sultancayir. At present, Bigadic, Emet, and Kirka deposits are operating. Kirka boron deposit is distributed within volcanoclatic sedimentary group as mainly layered, rarely brecciated and massive types. Major borate is borax associated with colemanite and ulexite. They show a horizontal symmetrical zonation from Na borate (borax) in the center of deposit to Na-Ca borate (ulexite) and Ca-borate (colemanite) in margin. Bigadic boron deposit is known as the largest colemanite deposit in the world. This deposit occurs as two borate bearing horizons in Miocene volcanoclastic sedimentary group. Thickness ranges from several meters to 100 meter with a length of several hundreds meters. Borate ore bodies which are mainly composed of colemanite and ulexite are alternated with claystone, mudstone, tuff and layered limestone as lenticular shape. Sultancayir boron deposit is mainly distributed within gray limestone. Main borate minerals of this deposit are pandermite and ulexite. Pandermite and ulexite occur as colloform aggregate and small veinlet, respectively. Turkish boron deposits are evaporite deposit which were formed in Miocene playa-lake environment. Boron was supplied to the deposits by the volcanic and hydrothermal activities.