Corrosion resistant tests of samples that have been used for 4 years are carried out in acid salt fog and corrosion resistant capability of the samples is forecasted based on non-equidistance grey forecasting theory.
The purification of phosphate rock by the method of acidic salt was studied for wetprocess phosphoric acid production, the conditions for highest magnesium removal and lowest P\-2O\-5 loss are determined (pH 2～3, temperature 50±2℃, reaction time 60 minutes, liquid/solid mass ratio 2, the amount of Mg removal agent 95% of the theoretical), thus the process is optimized.
The test throng the contractive analysis about the result of atmospheric corrosion test of WanNing test station and JiangJin test station and the result of litmjusless salt spray test and acidic salt spray test of carbon steel and low alloy steel,discuss the relativity between simulated accelerated test and atmospheric corrosion test, confirm the acceleration quality and reappeared quality of simulated accelerated test.
The test throng the contractive analysis about the result of atmospheric corrosion test of WanNing test station and JiangJin test station and the result of litmjusless salt spray test and acidic salt spray test of carbon steel and low alloy steel ,discuss the relativity between simulated accelerated test and atmospheric corrosion test, confirm the acceleration quality and reappeared quality of simulated accelerated test.
Analytical sample was cleaned up after addition of acidic salt solution and adsorbent to the matrix solution by counter extraction of analytes with hexane.
The following conclusions can be drawn from the research:(1) DFA, a DCD-HCHO polymer synthesized using AlCl3.6H2O as catalyst and NH4Cl as modifier, is a highly efficient cationic decolorizing flocculant. Its electric charge density and intrinsic viscosity are higher than the corresponding polymer prepared in the absence of AlCl3·6H2O.
The method is that the silica-gel particles was depolymerized by impregnating with acidified salt solution, then added into hydrothermal crystallization system.
On the basis of conclusion of previous experiment that mixed salt bath vanadinizing to the cold die, use the acid borax salt of bath in the TD process to several typical cold steel, compared the thickness ,hardness and other parameters that the same steel use the mixed salt of bath and the acid borax salt of bath,analysis the components of the salt of bath's impact to the coating's hardness andthickness.
This paper introduces a process to produce Gibberellin that uses the main fermentation jar and the fluid jar separately, adds nutritious substances, such as inorganic salts PS, acid salts A, amino acid GS, etc. , and adjusting metabolite continuously and flowingly. The production period of Gibberellin is reduced from 200 hours of traditional process to 150 hours by usung this process, the output reaches about 1550μg/ml.
Deposition conditions are studied, and a Langmuir-Blodgett film (LBF) based on the benzopurpurin 4B indicator immobilized in the polyamide acid salt matrix is obtained.
By gravimetric method, the corrosion rate of Ni electroplates is determined during the accelerated tests in neutral and acidic salt fog of 5% NaCl solution.
The pearl River Delta plains include the flat regions and the coastal areas of nine districts are namely: Shenzhan, Baoan, Dangkuan.Panyu, Zhongzhan, Deumen, Zhuhai, Xinkuai and Taishan of Guangdong province.The three major soil types in this region are the paddy soil,the alluvial soil,and the salt swamp soil.Thirty-five soil samples were taken for analysis. Analytical results showed that the soils had high contents of nitrogen and organic matter. Among these soils, the contents of organic matter and total ...
The formation and development of paddy soils in Zhujiang Delta is close related with the deposition and formation of the delta; with the enbankment beach land for planting rice, the soils is still under the condition of salinization and swamping, due to high salty groundwater table, and the swamping paddy soils are formed. Following the raising of land surface of polder fields and the lowering of the ground-water table, the eluviation-illuviation processes are weaker and plowpan is formed; thus the gelyed p...
The soil conditions of Feng Tong Zhai, La Ba River and wang Lang natural protective areas were investigated and studied. The results showed that cold fountain bambo could grew well on the acid, low base saturation percentage, thick soil horizon and low gravel content bleached-podzlic soils. It flowered and died on the alkaline, lime, shallow soil horizon and high gravel content calcareous soils.
酸性盐
acid salt
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