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Corrosion Inhibition Industry Borax Decahydrate Powder 381.37 Molecular Weight

Categories Sodium Borate Powder
Brand Name: YIXIN
Model Number: YXB-001
Certification: ISO9001
Place of Origin: CHINA
MOQ: Negotiable
Price: USD580-800/TON
Payment Terms: T/T, Western Union, L/C, D/P
Supply Ability: 3000 ton per month
Delivery Time: 3-12 working days
Packaging Details: 50kg/pp bag 20FCL:25MT
Other name: sodium borate
CAS NO: 1303-96-4
Molecular weight: 381.37
HS CODE: 2840190000
Density: 1.69-1.72 g/m3
Properities: powder
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Corrosion Inhibition Industry Borax Decahydrate Powder 381.37 Molecular Weight

Uses of 95% sodium tetraborate powder is metallurgical fluxes

corrosion inhibition and adhesives

►Product description

Borax, also known as sodium borate, sodium tetraborate, or disodium tetraborate,


is an important boron compound, a mineral, and a salt of boric acid. Powdered


borax is white, consisting of soft colorless crystals that dissolve easily in water. A


number of closely related minerals or chemical compounds that differ in their crystal


water content are referred to as borax, but the word is usually used to refer to the


decahydrate. Commercially sold borax is partially dehydrated.


Borax is a component of many detergents, cosmetics, and enamel glazes. It is


used to make buffer solutions in biochemistry, as a fire retardant, as an anti-fungal


compound, in the manufacture of fiberglass, as a flux in metallurgy, neutron-


capture shields for radioactive sources, a texturing agent in cooking, as a precursor


for other boron compounds, and along with its inverse, boric acid, is useful as an


insecticide.


In artisanal gold mining, the borax method is sometimes used as a substitute for


toxic mercury in the gold extraction process. Borax was reportedly used by gold


miners in parts of the Philippines in the 1900s.


Borax was first discovered in dry lake beds in Tibet and was imported via the Silk


Road to the Arabian Peninsula in the 8th Century AD.Borax first came into common


use in the late 19th century when Francis Marion Smith's Pacific Coast Borax


Company began to market and popularize a large variety of applications .


Chemistry


The structure of the anion [B4O5(OH)4]2− in borax


The term borax is often used for a number of closely related minerals or chemical


compounds that differ in their crystal water content:


· anhydrous sodium tetraborate, Na2B4O7


· sodium tetraborate pentahydrate, Na2B4O7·5H2O


· setraborate decahydrate, Na2B4O7·10H2O


Borax is generally described as Na2B4O7·10H2O. However, it is better formulated


as Na2[B4O5(OH)4]·8H2O, since borax contains the [B4O5(OH)4]2− ion. In this


structure, there are two four-coordinate boron atoms (two BO4 tetrahedra) and two


three-coordinate boron atoms (two BO3 triangles).


Borax is also easily converted to boric acid and other borates, which have many


applications. Its reaction with hydrochloric acid to form boric acid is:


Na2B4O7·10H2O + 2 HCl → 4 H3BO3 + 2 NaCl + 5 H2O


The "decahydrate" is sufficiently stable to find use as a primary standard for acid


base titrimetry.


When borax is added to a flame, it produces a yellow green color.Borax is not used


for this purpose in fireworks due to the overwhelming yellow color of sodium. Boric


acid is used to color methanol flames a transparent green.


►Details of borax


Borax Decahydrate is the refined form of natural sodium borate. Composed of boric


oxide (B2O3), sodium oxide, and water, it is a mild, alkaline salt, white and


crystalline, with excellent buffering and fluxing properties. Available in powder or


granular form, Borax Decahydrate is an important multifunctional source of B2O3,


particularly for processes in which the simultaneous presence of sodium is


beneficial.

Product name

sodium tetraborate

Molecular formulaNa2B4O7.10H2O
Molecular wight381.37
PropertiesWhite power or crystal granular
Purity95% min
UN number1458



►Specification


Item

Specification for borax decahydrate powder 95%

Na2B4O7.10H2O 95.00%
B2O336.47%
Na2O≥16.47%
Na2CO3≤0.2%
NaCL≤0.5%
Fe≤0.005%
Water insoluble≤0.04%

►Features


1. Borax Decahydrate is chemically stable under normal storage conditions. It will


slowly lose water of crystallisation if exposed to a warm, dry atmosphere.


Conversely, exposure to a humid atmosphere can cause recrystallisation at particle


contact points, resulting in caking. When storing the product, care should therefore


be taken to avoid wide fluctuations in temperature and humidity, and to ensure that


the packaging is not damaged.


2. Dissolved in water, Borax Decahydrate hydrolyzes to give a mildly alkaline


solution. It is thus capable of neutralizing acids. It also combines with strong alkalis


to form compounds of lower pH. The relatively constant pH of Borax Decahydrate


solutions makes it an excellent buffering agent.

►Application

1. Metallurgical fluxes


The ability of Borax Decahydrate to dissolve metal oxides is exploited in the


recovery of metals such as brass, copper, lead and zinc from scrap or smelting


slag.


In ferrous metallurgy, Borax Decahydrate is used as a cover flux to prevent


oxidation at the surface of the molten ingot. In welding, brazing, and soldering,


Borax Decahydrate covers the metal surfaces, excluding air and preventing


oxidation. It also acts as a solvent and cleaning agent.


2. Corrosion inhibition


Borax Decahydrate is incorporated in many aqueous systems requiring corrosion


inhibition. It protects ferrous metals against oxidation and finds use in the


manufacture of automotive and engine coolant formulations, and various water


treatment chemicals.The high solubility of Borax Decahydrate in ethylene glycol


makes it especially useful in car antifreeze formulations. Borax Decahydrate


neutralizes the acidic residue resulting from the decomposition of ethylene glycol


and minimizes the rate of oxidation at the surface of the metal. Aqueous solutions


of Borax Decahydrate have replaced chromates in railroad and other diesel engine


coolants.


3. Adhesives



Borax Decahydrate is part of the starch adhesive formulation for corrugated paper


and paperboard, and is a peptizing agent in the manufacture of casein-based and


dextrin-based adhesives. It greatly improves the tack and green strength of the


adhesive by crosslinking conjugated hydroxyl groups.



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