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Analysis of the interrelation between the characteristics of heat resistance, strainability, strength, and thermal expansion of
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| | Through an appropriately simpllfied calculation model, the sulfur-making method of sour con-taining l5%~50%H_2S has been studied, and two main understandings have been obtained as fol-lowing: (1)the conventional divided-flow Claus Process can be used for the H_2S concentration of l5% ~25%, the direct-flow Claus Process may be used for the sour gas of 49% H_2S as its concentration lower limit in general, accordmg to the thermal stability of commonly used material of furnace wall, 25%~4 5%H_2S is suitablely u... | | 通过适当简化的计算模型,研究了H_2S浓度为15%~50%的酸气制硫方法,获得如下主要认识:(1)15%~25%用常规分流克劳斯法,直流克劳斯法一般可以45%作为H_2S浓度的下限,根据常用炉壁材料的耐温性能,25%~45%宜使用非常规分流克劳斯法;(2)非常规分流克劳斯法的H_2S总转化率低于直流法而高于常规分流法。 | | 文摘来源 | | The Solidification characteristics of the composition system based on AG-80 epoxy resin and butyl titanate were investigated by means of differential scanning calorimetry (DSC) . The optimal content of the solidifying agent in this system is between 20% to 25% (wt) . The initial solidifying temperature was 150℃, and then the temperature rose slowly to 175℃, and was kept constantly for 1 hour, and then the temperature rose continuously up to 250℃ so as to solidifying the resin. The test results showed that t... | | 用差动扫描量热技术(DSC)研究了AG-80环氧树脂与钛酸丁酯混合体系的固化特性,确定了该体系中固化剂的最佳含量为20~25%(wt),固化起始温度为150℃,然后缓慢升温至175℃恒温1h,接着再升温到250℃便能使树脂充分固化。试验结果表明,经有机钛及活性氧化铜改性的AG-80环氧树脂具有较好的机械性能和耐温性能;有机钛可以作为环氧树脂的改性剂,也是环氧树脂的一种很好的固化剂,添加少量的活性氧化铜可以改善涂层的热性能和摩擦学性能;在制膜工艺上于喷膜后室温下放置2~5h可以明显改善涂层的摩擦学性能(特别是耐磨性)。 | | 文摘来源 | | A bright citrate Sn-Zn alloy plating process is developed as a substitute for cadmium plating to meet the requirements under maritime climate conditions.Ammonium citrate is used as a main comploxer,ammonium sulfate as conductive salt as well as auxiliary complexer,ZY-3 as stabilizer to prevent Sn~(4+) from growing too fast,and ZY-1/ZY-2 as brightener.The influence of pH value,current density,temperature and agita- tion is studied.Its covering power,throwing power,deposition rate,corrosion resistance,soldera... | | 为了解决代镉镀层,满足海洋性气候条件下的使用需要,我们研究了柠檬酸盐电镀光亮锡锌合金的工艺。采用柠檬酸铵作为主络合剂,硫酸铵作为导电盐和辅助络合剂,稳定剂ZY-3用来防止 Sn~(4+)增长过快,ZY-1,ZY-2作为光亮剂。研究了 pH 值,电流密度,温度和搅拌的影响,测定了分散能力、深镀能力,沉积速度,抗蚀性能、焊接性能,耐温性能,结合力和硬度。最后还研究了镀后的钝化处理工艺及废水处理方面的一些问题。实践表明,本工艺可以满足产品技术要求,并已投入生产使用。 | | 文摘来源 | |   | | << 更多相关文摘 |
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