细炻砖铜锈缺陷研究

细炻砖作为仿古砖的一个重要组成部分一直在家庭装修中被广泛应用。在细炻砖的生产过程中,铜锈在浅色版面中容易显露出来,占总缺陷的比例比较大,也降低了产品的品质。本文用XRF对原材料和坯体配方进行了定性分析,用SEM对铜锈进行了表面形貌分析,用EDS对铜锈进行了元素分析。结果表明,铜锈主要是原料中的有色金属杂质引起。通过加强浆料的过筛,降低浆料的细度可以有效减少铜锈的产生。     

大理石表面锈斑的事故树分析

大理石饰面材料在使用过程中，容易受到人为因素和环境的影响，致使大理石丧失了其保护建筑物墙体、美化建筑物等基本功能，也直接影响着大理石的使用寿命。在大理石材料产生的众多病症中，锈斑是最为常见的。通过安全系统工程的事故树分析方法，作者对引起大理石表面锈斑形成的各个因素进行系统分析，建立以大理石表面产生锈斑为顶上事件的事故树。通过对大理石表面产生锈斑事故树的分析，得到了事故树的最小割集、最小径集和结构重要度，为大理石饰面材料表面产生锈斑的预防提供了可信的参考依据，并给出了大理石锈斑的防治措施。     

在役油罐内壁除锈喷嘴外流场数值模拟

针对在役单层油罐改造成双层罐的除锈问题,选用磨料水射流喷嘴为研究对象,使用计算流体力学方法,进行了混合磨料水射流对油罐内壁除锈效果的数值模拟。以射流打击靶面的最大剪切力和冲蚀磨损率作为评价指标,研究结果表明:前混合磨料水射流达到相同的除锈效果相较于后混合磨料水射流所需的射流压力更低,射流入射压力为20 MPa时,除锈效果较理想且具有较好的经济性;剪切力在靶面上存在一个核心作用区,最大剪切力位置不在靶面中心处;冲蚀磨损率随磨料的体积浓度、磨料粒径、磨料密度的增大而增大,而最大壁面剪切力不随其增大而变化。     

A review of corrosion inhibitors for rust preventative fluids

Corrosion of metals has been a widespread issue in industries for centuries. The use of corrosion inhibitors in rust preventative fluids are commonly employed to provide the temporary corrosion protection to metals. The aim of this review is to summarize the rust inhibition properties, inhibition mechanism, chemistry and development of corrosion inhibitors for rust preventative fluids. Some suggestions for further research on corrosion inhibitors have also been discussed.     

A proposal to evaluate the amount of corroded iron converted into adherent rust in steels exposed to corrosion

To calculate the amount of iron corroded from the steels that form part of the adherent rust, α, we propose a procedure that considers mass measurements and the use of spectroscopic techniques to estimate the relative iron phase abundances. We derived an equation to calculate α and evaluate it for carbon steels (CS) and weathering steels (WS) exposed to accelerated outdoor corrosion tests. The values of α are estimated at 0.93 and 0.76 for CS and WS after 2 years of exposure, respectively. The relative iron phase abundances pointed out to a non-protective and active type of rust.     

蒸汽回转干燥机“T”换热管的改造及应用

通过技术分析、焊接试验、结构改造,优化换热管的加工及结构,并成功应用于生产实践中。     

高压水在焦炉气配套甲醇装置中的应用

通过高压水力切割煤气管线的盲端进行甩头、煤气管道在线割孔和高压水清洗炉门和循环氨水喷嘴、以及设备除锈的实际生产应用,总结了该技术的特点,可供同行在处理此类问题时借鉴。     

油泵后盖锈蚀原因分析

本文通过金相显微镜,KYKY-2800扫描电镜和VANTAGE能谱仪等设备对北京产油泵后盖和德国产油泵后盖进行了分析。分析得出：北京产油泵后盖内壁表面存在的锈层为最后的抛丸工艺不彻底而遗留的产物,因此应加强抛丸清理的效率,在尽可能选择较小规格丸粒基础上,综合考虑丸粒硬度,抛丸机的型号以及抛丸时间等。     

Influence of phosphate species on green rust I transformation and local structure and morphology of γ-FeOOH

To clarify the role of phosphate in the formation of corrosion products, the transformation of GRI(Cl⁻) with the addition of phosphate was characterized through XRD, TEM, and solution analysis. Electrochemical analysis showed that the transformation of GRI(Cl⁻) was delayed and the size of the final products, i.e., γ-FeOOH was reduced in the phosphate added case. X-ray absorption spectroscopy indicated that the neighboring Fe–Fe coordination number of FeO₆ octahedral unit in γ-FeOOH was decreased. These effects of phosphate are attributed to its adsorption on GRI(Cl⁻) and nucleated γ-FeOOH that prevented particle growth during oxidation process.     

Role of zinc compounds on the formation, morphology, and adsorption characteristics of β-FeOOH rusts

To simulate the corrosion of galvanized steel in marine zone, β-FeOOH was prepared by aging the FeCl₃ solutions containing ZnCl₂ and zinc rusts such as ZnO and zinc hydroxychloride (Zn₅(OH)₈Cl₂·H₂O:ZHC). Adding ZnCl₂, ZnO, and ZHC inhibited the crystallization and particle growth of β-FeOOH and the inhibitory effect was in order of ZHC ≈ ZnO > ZnCl₂. The adsorption of H₂O and CO₂ was suppressed by adding ZnCl₂, ZnO, and ZHC. These results imply that the rust formed on galvanized steel in marine environment is more compact, amorphous, and hydrophobic in nature which may lead to improve the corrosion resistance.