磁场对两种浓度氯化钠溶液中铜阳极溶解的影响

采用线性电位扫描法研究了不同强度磁场对铜在两种浓度氯化钠溶液中阳极溶解的作用，在高阳极电位区间铜的阳极溶解表现出传控制的特征，且较高浓度氯离子对应较高阳极电流，0．1－0．4T笑 场增大高阳极电位区的电流密度，磁场作用系qmag随磁场强度（B）氯离子浓度增大而增大，qmag-B曲线拟合结果表明：介质为0.6mol/LNaCl时，磁场强度指数值在1．0－2．0之间，介质为4.0mol/LNaCl时，磁场强度指值小于1．0。     

Effect of the combination of various NaCl levels and soy protein isolate on the quality characteristics of smoked pork loins

The objectives of this study were to evaluate the physicochemical, textural and sensory properties of smoked pork loins (PL) containing various levels of NaCl (0.0–2.0%) alone or in combination with soy protein isolates (SPI; 1.0%). The pH values, moisture, fat, and protein contents (%) of smoked PL were 5.97–6.17, 63.3–69.1%, 2.64–4.26%, and 20.2–26.6%, respectively. Increased NaCl levels increased moisture contents (%) and sensory scores, as well as reduced Hunter redness and yellowness and cooking loss (CL, %) (P < 0.05). A NaCl level of 1.0% had resulted in a CL (%) level similar to those at regular‐salt levels (1.5% and 2.0% NaCl). When 1.0% SPI was incorporated with smoked PL, the NaCl level of 0.5% was also similar to the CL (%) at higher NaCl levels and improved sensory scores. Thus, a NaCl level of at least 1.0% was required for the manufacture of smoked PL; however, smoked PL could be manufactured with 0.5% salt when 1.0% SPI was included as part of the manufacture of smoked PL to effect quality characteristics similar to those achieved with regular‐salt (1.5% and 2.0% NaCl) smoked PL.     

Phase diagrams and thermochemical modeling of salt lake brine systems. II. NaCl+H2O,KCl+H2O,MgCl2+H2O and CaCl2+H2O systems

This study is part of a series of studies on the development of a multi-temperature thermodynamically consistent model for salt lake brine systems. Under the comprehensive thermodynamic framework proposed in our previous study, the thermodynamic properties of the binary systems (i.e., NaCl+H₂O, KCl+H₂O, MgCl₂+H₂O and CaCl₂+H₂O) are simulated by the Pitzer–Simonson–Clegg (PSC) model. Various thermodynamic properties (i.e., water activity, osmotic coefficient, mean ionic activity coefficient, enthalpy of dilution and solution, relative apparent molar enthalpy, heat capacity of aqueous phase and solid phases) are collected and fitted to the model equations. The thermodynamic properties of these systems are reproduced or predicted by the obtained model parameters. Comparison to the experimental or model values in the literature suggests that the model parameters determined in this study can describe all of the thermodynamic and phase equilibria properties over wide temperature and concentration ranges. This modeling study of binary systems provides a solid basis for property predictions of salt lake brines under complicated conditions.     

Corrosion Behavior of Ti60 Alloy Coated with a Solid NaCl Deposit in O2 Plus Water Vapor at 500-700°C

The corrosion behavior of Ti60 has been studiedin oxygen containing water vapor at500-700^°C, with and without a solid NaCldeposit on the surface. No measurable corrosion of theTi60 alloy was observed in atmospheres without NaCl.Corrosion of Ti60 was accelerated in the presence ofNaCl because of the formation of a nonprotectiveTiO₂ oxide scale; the corrosion of Ti60 issignificantly aggravated due to the synergistic effect ofNaCl and water vapor. When the temperature was increasedup to the melting point of NaCl, the corrosion of Ti60coated with NaCl both in air-NaCl and inO₂-NaCl plus water vapor became more severe. Amechanism to explain the effect of water vapor and NaClon the corrosion of Ti60 is proposed.     

环境介质对ASTM A572 Gr65钢疲劳行为的影响

目的 探究不同环境对ASTM A572 Gr65低合金结构钢疲劳强度的影响。方法 在实验室、去离子水和NaCl(3.5%)水溶液环境下进行材料的旋转弯曲疲劳试验，利用疲劳试验设备和显微硬度仪探讨不同环境介质下ASTMA572Gr65低合金结构钢的疲劳强度和断口附近硬度的变化情况，并通过扫描电子显微镜（SEM）和能谱仪（EDS）等对断口腐蚀形貌及腐蚀产物进行分析。结果 ASTM A572 Gr65钢在实验室环境下的疲劳强度为380 MPa，在添加去离子水和NaCl水溶液时的疲劳强度分别为280、80 MPa，分别下降了约26.3%、78.9%；其微观组织为珠光体和铁素体，在疲劳破坏后靠近断口处试样的晶粒存在明显的细化现象，而远离断口的母材微观组织均匀，断口附近的显微硬度因位错运动约升高了10.4HV0.5，当距离增加，硬度逐渐趋于母材本身的硬度时，改变距离约为6mm；与实验室环境相比，在去离子水和NaCl水溶液中均存在多个裂纹源，这对于疲劳断裂破坏起到了加速作用，疲劳断口表面分区不明显，断口表面存在氧化腐蚀产物和二次裂纹。结论 在添加去离子水和NaCl水溶液后，会加速ASTMA572Gr...     

特定条件下的奥氏体不锈钢应力腐蚀开裂行为

文章研究了退火态1Cr18Ni9Ti奥氏体不锈钢在78±5℃的纯NaCl溶液和NH4Cl加NaCl混合溶液中的应力腐蚀行为。结果表明,在22%NaCl中试样经1000h试验不发生应力腐蚀开裂。而浸在3%NH4Cl加17%NaCl,5%NH4Cl加10%NaCl,5%NH4Cl加17%NaCl,5%NH4Cl加25%NaCl四种混合溶液的试样经过小于1000h就产生应力腐蚀裂纹或断裂,所以NH4Cl促进了1Cr18Ni9Ti钢在NaCl溶液中的应力腐蚀开裂。依据断口扫描形貌和裂纹扩展途径的金相观察,探讨了在混合溶液中应力腐蚀机制。     

钢的环保型NaCl水溶液缓蚀剂的研制

研制了适用做盐水冷冻液和NaCl冷媒的环保型廉价缓蚀荆,在4℃和30℃的1％～25％ NaCl加自来水的盐水溶液中,研制缓蚀剂对低碳钢、低碳锰钢和Cr-Mo钢都有良好的防锈能力,并且在pH值4.O～8.5的塔里木河水中,该缓蚀剂均有缓蚀效果,而以在中性河水中效果最好。     

电解液浓度对双槽法腐蚀多孔硅的影响

设计了一种电化学双槽腐蚀装置,研究了不同电解液的浓度对制备多孔硅形貌和光学特性的影响.研究结果表明采用此装置制备的多孔硅孔洞均匀性好,并且随NaCl电解液浓度的增加,制备的多孔硅孔径呈减小的趋势,发光强度有所增强.     

硫氯含量对TC4渗铝涂层高温腐蚀性能的影响

针对垃圾焚烧炉受热面的高温腐蚀,分析了硫/氯协同作用对涂层高温腐蚀性能的影响,以期为未来涂层服役性能的提升提供理论指导,促进垃圾焚烧发电的发展。在实验室模拟气氛（体积分数95%）+O₂（体积分数5%）条件下,对涂有Na₂SO₄盐、NaCl盐及NaCl+Na₂SO₄混合盐的TC4渗铝样品进行600 ℃的高温腐蚀实验,并利用扫描电镜（SEM）、能量色散光谱仪（EDS）和X射线衍射（XRD）等手段对试样进行了分析。结果表明：当喷涂Na₂SO₄溶液时,涂层表面发生微弱的腐蚀;当喷涂NaCl+ Na₂SO₄（质量分数比1:2）混合盐溶液时,在涂层表面生成了多层结构的腐蚀氧化层;当喷涂NaCl溶液时,涂层表面发生了严重的腐蚀,腐蚀产物主要是富含Al、Ti的氧化物和氯化物。在腐蚀过程中,氯化钠在高温下形成Cl^-1,其穿透初期形成的氧化膜,随后生成的金属氯化物在高温下汽化,向外扩散到达表面氧分压较高的区域时又被氧化为金属氧化物,此过程连续循环,使表面的多层氧化膜不断被腐蚀,随着Cl^-1浓度的增加样品的腐蚀更加严重,但S和Cl的协同作用可以降低涂层的腐蚀速率。     

NaCl/SDS协同作用下超声辐射引发MMA无皂乳液聚合的研究

在超声辐射下,未添加引发剂,以NaCl和小于临界胶束浓度的乳化剂（十二烷基硫酸钠,SDS）混合水溶液为介质,快速无皂乳液聚合甲基丙烯酸甲酯（MMA）,获得稳定的聚甲基丙烯酸甲酯白色乳液。讨论了超声功率、乳化剂浓度和无机盐浓度对单体转化率的影响;比较单体MMA和聚合物PMMA的红外光谱图（FT-IR）,发现聚合后1637cm-1处的C=C双键吸收峰几乎消失,这表明单体MMA在超声辐射条件下已基本上聚合;聚合物PMMA的GPC曲线为单峰,Mn=384706,Mw=529554,PDI=1.37,聚合物分子量较大,分布较窄;TEM观察发现,得到的乳胶粒大小、分布均匀,粒径较小;探讨了超声辐照无皂乳液聚合的可能过程。