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Investigation of the influence of Mg on the corrosion behavior of hard coated steel substrates

Mg对硬涂层钢基体腐蚀行为影响的研究

基本信息

批准号：
217330056
负责人：
Dr. Martin Fenker
金额：
--
依托单位：
Forschungsinstitut Edelmetalle und Metallchemie (fem)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/217330056?language=en
关键词：
Investigation influence Mg corrosion behavior

项目摘要

The renewal proposal enhances and focuses the aims of the running project with regard to intermediate results and hypotheses. Out of this three major aims are conducted.At first the predicted corrosion protection model will be finally verified by electrochemical methods and the influencing factors on the corrosion behavior (area ratio, chemical and structural coating properties) will be correlated to the efficiency of magnesium in the coating. This knowledge in combination with electrochemical behavior of magnesium in the corrosion system enables a specific development of hard coating systems with enhanced corrosion performance.Secondly the reason for the worse corrosion behavior of coatings from application-relevant mixed-target deposition will be investigated by electrochemical methods and structure analysis. From this investigations information to the binding state of magnesium and the influence of nitrogen content on the corrosion behavior should be derived. This is a prerequisite for the optimization of the coating procedure to produce application-relevant and corrosion resistant PVD-hard-coatings on steel.The third aim is the development of a short-time testing method based on the combination of electrochemical and optical investigation techniques for the evaluation of the corrosion protection efficiency. After an adaption of testing parameters this methods enables the qualitatively and quantitatively characterization of the coatings by means of electrochemical parameters and statistical evaluation of indicated defects. Furthermore a direct correlation to the coating defects becomes possible which enhances the development of more corrosion resistant coatings. Compared to the conventional salt spray testing a better meaningfulness, sensitivity and efficiency can be expected.The achieved results in the renewal project should enhance the understanding of the corrosion protection mechanism as well as influencing factors initiating corrosion and controlling its kinetic. The application potential of these new hard coatings can be estimated and the findings can be used for the future development of corrosion resistant hard coatings.

更新建议增强并集中了正在进行的项目关于中间结果和假设的目标。在这三个主要目标进行，首先预测的腐蚀保护模型将最终通过电化学方法验证和腐蚀行为的影响因素（面积比，化学和结构涂层性能）将相关的镁在涂层中的效率。结合镁在腐蚀体系中的电化学行为，这一知识使得具有增强腐蚀性能的硬涂层系统的特定开发成为可能。其次，将通过电化学方法和结构分析来研究与应用相关的混合靶沉积涂层的腐蚀行为较差的原因。从这一调查的信息，镁的结合状态和氮含量对腐蚀行为的影响，应得出。这是优化涂层工艺以在钢上生产与应用相关的耐腐蚀PVD硬涂层的先决条件。第三个目标是开发一种基于电化学和光学研究技术相结合的短时测试方法，用于评估腐蚀保护效率。在调整测试参数后，该方法能够通过电化学参数和指示缺陷的统计评估来定性和定量表征涂层。此外，与涂层缺陷的直接相关性成为可能，这促进了更耐腐蚀涂层的开发。与传统的盐雾试验相比，盐雾试验具有更高的意义、灵敏度和效率，其结果将有助于加深对腐蚀防护机理、影响因素、腐蚀启动和控制动力学的认识。这些新的硬质涂层的应用潜力可以估计和研究结果可以用于未来的耐腐蚀硬质涂层的发展。