以试验设计(Design of Experiment,DOE)理论和方法为基础,选取SAE 1008-1010标准腐蚀板作为试验对象,以其试验前后的质量损失值,即腐蚀强度为试验指标,识别出影响盐雾试验腐蚀强度的试验因子,并逐一分析和筛选,最后利用Minitab软件,通过...以试验设计(Design of Experiment,DOE)理论和方法为基础,选取SAE 1008-1010标准腐蚀板作为试验对象,以其试验前后的质量损失值,即腐蚀强度为试验指标,识别出影响盐雾试验腐蚀强度的试验因子,并逐一分析和筛选,最后利用Minitab软件,通过DOE部分因子设计方法对相关试验因子分别设置2个高低水平值,进行正交试验设计,最终得到影响标准腐蚀板质量损失的关键腐蚀因子。展开更多
It is known that localized corrosion attack takes a preponderant role in the onset of stress corrosion cracking of pipeline steels in high pH conditions. Carbonate/bicarbonate solutions can be employed to study the lo...It is known that localized corrosion attack takes a preponderant role in the onset of stress corrosion cracking of pipeline steels in high pH conditions. Carbonate/bicarbonate solutions can be employed to study the localized corrosion behavior of these materials. In addition to the presence of chloride ions in the electrolyte, the solution temperature is also of prime importance to the onset of pitting corrosion. The aim of this work is to evaluate the influence of the testing temperature on the corrosion behavior of the API 5L X70 pipeline steel which is a standard material for gas pipelines in Brazil. Samples were exposed to a solution consisting of Na2CO3, NaHCO3 and NaCl at three different temperatures： RT （room temperature）, 40 ℃ and 60 ℃. The corrosion morphology was observed using SEM （scanning electron microscopy）. The results showed that pitting corrosion became facilitated when the steel was immersed at higher temperatures.展开更多
This paper designed and synthesized a series of different chain length of phthalonitrile-terminated oligo （phthalazinone imide）, it has good water solubility, and can be under normal atmospheric pressure to form the...This paper designed and synthesized a series of different chain length of phthalonitrile-terminated oligo （phthalazinone imide）, it has good water solubility, and can be under normal atmospheric pressure to form the s-triazine rings-containing thermosetting oligo （phthalazine imide）. Compared with the traditional thermosetting resin, the resin has the advantages of high temperature resistance, high strength, flame retardant, resistance to chemical corrosion.展开更多
The factors that influence magnesium（Mg）corrosion in vitro are systematically evaluated from a review of the relevant literature. We analysed the influence of the following factors on Mg biocorrosion in vitro：（i）...The factors that influence magnesium（Mg）corrosion in vitro are systematically evaluated from a review of the relevant literature. We analysed the influence of the following factors on Mg biocorrosion in vitro：（i） inorganic ions,including both anions and cations,（ii） organic components such as proteins, amino acids and vitamins, and（iii） experimental parameters such as temperature, p H, buffer system and flow rate. Considerations and recommendations towards a standardised approach to in vitro biocorrosion testing are given. Several potential simulated body fluids are recommended. Implementing a standardised approach to experimental parameters has the potential to significantly reduce variability between in vitro biocorrosion tests, and to help build towards a methodology that accurately and consistently mimics in vivo corrosion. However, there are also knowledge gaps with regard to how best to characterise the in vivo environment and corrosion mechanism. The assumption that blood plasma is the correct bodily fluid upon which to base in vitro methodologies is examined, and factors that influence the corrosion mechanism in vivo, such as specimen encapsulation, bear consideration for further studies.展开更多
文摘以试验设计(Design of Experiment,DOE)理论和方法为基础,选取SAE 1008-1010标准腐蚀板作为试验对象,以其试验前后的质量损失值,即腐蚀强度为试验指标,识别出影响盐雾试验腐蚀强度的试验因子,并逐一分析和筛选,最后利用Minitab软件,通过DOE部分因子设计方法对相关试验因子分别设置2个高低水平值,进行正交试验设计,最终得到影响标准腐蚀板质量损失的关键腐蚀因子。
文摘It is known that localized corrosion attack takes a preponderant role in the onset of stress corrosion cracking of pipeline steels in high pH conditions. Carbonate/bicarbonate solutions can be employed to study the localized corrosion behavior of these materials. In addition to the presence of chloride ions in the electrolyte, the solution temperature is also of prime importance to the onset of pitting corrosion. The aim of this work is to evaluate the influence of the testing temperature on the corrosion behavior of the API 5L X70 pipeline steel which is a standard material for gas pipelines in Brazil. Samples were exposed to a solution consisting of Na2CO3, NaHCO3 and NaCl at three different temperatures： RT （room temperature）, 40 ℃ and 60 ℃. The corrosion morphology was observed using SEM （scanning electron microscopy）. The results showed that pitting corrosion became facilitated when the steel was immersed at higher temperatures.
文摘This paper designed and synthesized a series of different chain length of phthalonitrile-terminated oligo （phthalazinone imide）, it has good water solubility, and can be under normal atmospheric pressure to form the s-triazine rings-containing thermosetting oligo （phthalazine imide）. Compared with the traditional thermosetting resin, the resin has the advantages of high temperature resistance, high strength, flame retardant, resistance to chemical corrosion.
基金supported by the Australian Federal Government through an Australian Government Research Training Program Scholarshipsupport of the Australian Research Council (ARC) (DP170102557 "Biodegradable magnesium alloy scaffolds for bone tissue engineering")support of the ARC Research Hub for Advanced Manufacturing of Medical Devices
文摘The factors that influence magnesium（Mg）corrosion in vitro are systematically evaluated from a review of the relevant literature. We analysed the influence of the following factors on Mg biocorrosion in vitro：（i） inorganic ions,including both anions and cations,（ii） organic components such as proteins, amino acids and vitamins, and（iii） experimental parameters such as temperature, p H, buffer system and flow rate. Considerations and recommendations towards a standardised approach to in vitro biocorrosion testing are given. Several potential simulated body fluids are recommended. Implementing a standardised approach to experimental parameters has the potential to significantly reduce variability between in vitro biocorrosion tests, and to help build towards a methodology that accurately and consistently mimics in vivo corrosion. However, there are also knowledge gaps with regard to how best to characterise the in vivo environment and corrosion mechanism. The assumption that blood plasma is the correct bodily fluid upon which to base in vitro methodologies is examined, and factors that influence the corrosion mechanism in vivo, such as specimen encapsulation, bear consideration for further studies.
