The Condensation and Decomposition of Alkaline Earth and Phenyl Phosphoramidates with Acids
作者:Shoji Sato、Takao Takayanagi、Makoto Watanabe
DOI:10.1246/bcsj.60.3941
日期:1987.11
Alkalineearth and phenyl phosphoramidates were reacted with dried hydrogen chloride, acetic acid, and oxalic acid. The alkalineearth phosphoramidates other than the magnesium salt reacted with the acids to produce ortho- and polyphosphates, but did not react with them to make polyphosphates containing imino groups. The hydrolysis of the phosphoramidates to orthophosphate has been considered to be
碱土和苯基氨基磷酸酯与干燥的氯化氢、乙酸和草酸反应。除镁盐外的碱土金属氨基磷酸酯与酸反应生成正磷酸盐和多磷酸盐,但不与它们反应生成含有亚氨基的多磷酸盐。氨基磷酸酯水解成正磷酸盐被认为是多磷酸盐生产的开始:(备注:图示省略。)其中 M 代表碱土金属离子。例如,多磷酸盐的形成可以通过以下等式来解释:(备注:省略图形。) 其中 HA 代表酸。氨基磷酸镁与乙酸和草酸反应生成正磷酸盐、多磷酸盐和亚胺二磷酸盐。
Phase changes on heating ammonium magnesium phosphate hydrates
作者:B.E.I. Abdelrazig、J.H. Sharp
DOI:10.1016/0040-6031(88)87336-2
日期:1988.7
paths, dependent on the combination of phases present and the experimental variables, especially the atmosphere. By heating samples to various temperatures, quenching to room temperature and examining the reaction products by X-ray diffraction, the phases formed after various heat treatments have been identified. The most important reaction sequence on heating in the presence of excess MgO is
The Synthesis and Chemical Reaction of Magnesium and Calcium Bis(phosphorodiamidates) with Acids
作者:Shoji Sato、Takao Takayanagi、Makoto Watanabe
DOI:10.1246/bcsj.62.267
日期:1989.1
Magnesium bis(phosphorodiamidate) hexahydrate and calcium bis(phosphorodiamidate) dihydrate were made by adding an aqueous solution of magnesium chloride or calcium chloride to a sodium phosphorodiamidate solution. These phosphorodiamidates reacted with the water of crystallization and/or adsorbed water to produce phosphoramidate and orthophosphate. They also reacted with HCl gas, acetic acid, and
Method of producing protective coatings that are resistant to corrosion
申请人:Electro Chemical Engineering GmbH
公开号:US04978432A1
公开(公告)日:1990-12-18
A method of producing protective coatings that are resistant to corrosion and wear on magnesium and magnesium alloys by anodic oxidation. In order to obtain coatings that have little or no inherent color, that can be easily colored, and that provide a satisfactory adhesive base for lacquering or subsequent processing, a low-alkali aqueous electrolyte bath containing (a) borate or sulfonate anions and (b) phosphate and fluoride or chloride ions and adjusted to a pH of 5 to 11 and preferably 8 to 9 is employed. A direct current is applied and is either briefly turned off or its polarity incompletely reversed to allow the formation of manganese phosphate and magnesium fluoride or magnesium chloride and optionally magnesium aluminate.