There are three methods to separate boron from steel

Usually high-alloy steel, nickel-based superalloy containing elementssuch as niobium, tantalum, titanium, aluminum, the affinity of nitrogen is muchlarger than boron, and therefore rarely form boron nitride, the full amount ofboron can be obtained by sulfuric smoke. PPGI PPGL steel coil, low-alloy steel issometimes available the full amount of boron, sometimes range between acid-solubleboron and boron. Therefore, for the direct decomposition of the acid-insolubleboron, is still needing majority of workers continue to explore. In addition,it was pointed out that although the acid-soluble boron is not equal toeffective boron, but the acid-soluble boron with good correspondence between hardenability,for routine chemical analysis, analyze the acid-soluble boron is appropriate,but this proposal not yet been recognized, and thus the analysis of boron, is stillneed measured, the difference between the acid-insoluble boron.

According to metal powder supplier, there are three methods to separate boron from steel, precipitation method, the sampleuse alkali melt or increase alkaline in the test solution, so that the vastmajority of iron, chromium, manganese, nickel, cobalt, titanium, copper andother interfering elements removed by precipitation, then dry the filterportion of the test solution of boron determination. This method is simple,fast, applicable to the separation of the higher content of boron, but can notremove silicon, aluminum, molybdenum, tungsten and other elements.The distillation method, is boron’sclassical separation methods. This method is the use of boric acid withmethanol to generate trimethyl borate methanol [B (OCH3) 3], the boron andother elements to obtain efficient separation, applicable to more complexcomponents of the high-alloy steels, and various other alloys, is the currentinternational standard separation means of the method of the main. The maindrawback is that the separation time is long, and need quartz ware.

However, ifuse boron-free glass or plastic devices instead of quartz vessel, also canobtained the same separation effect.Extraction method, make boron reacting withhydrofluoric acid, [BF4] - anion is formed, then adding the basic dye, such asmethylene blue, ethyl violet, brilliant green, etc., to generate a ternarycomplex, and then use two tetrachloroethane, benzene, chlorobenzene and other solventto extract, achieve the purpose of separation and color. The disadvantage isthat when the total amount of niobium, tantalum, is less than 0.5%, can usewashing method to eliminate interference.