The,application,boron-containi business, insurance The application of boron-containing additives
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99.9999% of the boronpowder is mainly used for the monocrystalline silicon dopant, but also used forspecial additives and polycrystalline diamond, and other fields in the alloymaterials.Over the past decade, many metalpowder suppliers are studying the friction properties of the boronadditives, thought that boric acid ester is adsorbed on the friction surfaceplays the role of anti-wear, measure the friction surface film containssubstances such as BN and FeB. Boric acid ester is electron-deficient system,B3 + have strong electrophilic performance, since the time of the P orbit cancapture foreign electronic, there is a strong tendency to reach 8 electronicstability structure. In the friction process of the mechanical action, so thatthe surface defects become energy rich center, when the energy is gathered tothe greater than the work function of the electron, the metal surface will beemitted outside excited electron. Electron-deficient boric acid ester caneasily receive such outer excited electron, and the adsorption film is formedon the metal surface. Formation of the outside excited electron adsorptionfunctions under low load, have the friction reducing effect, the adsorptioncapacity is stronger than the physical adsorption film, and therefore the boronshows a good antifriction effect than the base oil. However, the high load makethis film can rupture the bond, the high energy BO bond breaking, isolatingboron atoms penetrate the metal surface to form a wear layer ofboron-containing compounds.The most commonly used laboratoryassessment of four-ball machine additives extreme pressure abrasion resistance,the PB values embodied oil film strength, wear scardiameter size is reflected in the ability of anti-wear additives, boron cansignificantly reduce the wear scar diameter, increase the PB, when the dosage exceeds1%, this change is slowed down, which may be the additive adsorbed on the metalsurface has become saturated the sake.The prominent antioxidant is another greatfeature of boron, good thermal oxidation stability to ensure that the oil willnot in the long-term use due to the oxidative decomposition andpolycondensation reaction of the lubricating oil viscosity, acid value andcorrosive increased to generate sludge and sedimen to affect normal use of oil,lubricating oil oxidation resistance by rotating the oxygen bomb test to assess,the oxygen pressure dropped to a predetermined indicators longer required, thenthe better the oxidation resistance of the additive. The new additive productidentification must be fully formulated assessed the boron agent pleiotropic,low dose so that oil, widely used in the gear oil.Boron is an excellent thermal stability andnew wear extreme pressure additive, the extreme pressure mechanism withtraditional parathion type additive. Parathion type extreme pressure antiwearagent is generated due to the chemical reaction occurs under heat and pressuregenerated when the sliding of the metal surface with the metal surface, and boronis generated on the friction surface semi-solid, a strong adhesion of theelastic borate salt film. The thickness of the film of the borate is sulfur,phosphorus extreme film ten times, with a high load carrying capacity andimpact resistance.With the development of chinese autoindustry, environmental protection, the continuous introduction ofenergy-saving regulations and enforcement increased, in the near future, theboron-containing environmental protection, energy-saving additive widely used. Whereinthe Boronated succinimide has to improve the compatibility of lubricants andrubber seals, especially the viton compatible resistance is a very importantperformance, make the boronated succinimide with good application prospects,and the future market demand is potential.Source:http://www.mhcmp.com Article Tags: Boric Acid Ester, Boric Acid, Acid Ester, Friction Surface, Metal Surface, Excited Electron, Extreme Pressure
The,application,boron-containi