Potassium nitrate and sodium nitrate in mixing proportion of KNO₃–NaNO₃ 40-60 wt% (also called solar salt) has been successfully used for over a decade as heat storage medium for concentrated solar power parabolic-trough collector plants at temperatures up to 400 °C. At temperatures of 560 °C, reached in state-of-the-art solar tower systems, corrosion of metallic components in contact with solar salt can become an issue and has caused leaks and plant shut-downs in recently built tower projects. While the corrosion rates of several materials have been determined for different temperatures in static molten salt immersion experiments, there is a lack of corrosion data for dynamic in-service conditions. In this work, a dynamic corrosion test has been conducted on 19 different material types including protective coatings, mimicking flow-rate, temperature gradient and draining of in-service operation of a receiver in a concentrated solar power tower. The measured corrosion rates are presented and compared to static corrosion tests reported in literature.

KNO ₃ –NaNO ₃ 40-60 wt%混合比例的硝酸钾和硝酸钠（也称为太阳盐）已成功用作热存储介质，用于温度高达 400 °C 的聚光太阳能抛物线槽集热器工厂。在最先进的太阳能塔系统达到 560 °C 的温度下，与太阳盐接触的金属部件的腐蚀可能成为一个问题，并导致最近建造的塔式项目发生泄漏和工厂关闭。虽然在静态熔盐浸泡实验中已经确定了几种材料在不同温度下的腐蚀速率，但缺乏动态使用条件下的腐蚀数据。在这项工作中，对 19 种不同类型的材料进行了动态腐蚀测试，包括保护涂层、模拟流速、集中式太阳能发电塔中接收器在役操作的温度梯度和排水。提供了测得的腐蚀速率，并与文献中报道的静态腐蚀试验进行了比较。