为探究新型低熔点三元混合硝酸盐的高温腐蚀特性,该文采取失重法研究347H和316L不锈钢在500 ℃和550 ℃两种温度下三元硝酸盐中的静态腐蚀行为。结果表明,随着腐蚀温度的升高,347H和316L不锈钢的腐蚀速率都随之增高;相同温度下,随着浸泡时间的增加347H和316L不锈钢的失重量都随之增加,而腐蚀速率却随之下降。在550 ℃下腐蚀1000 h后347H不锈钢和316L不锈钢的腐蚀速率分别为0.0313、0.04439 mm/a。在相同的腐蚀时间下,347H不锈钢表现出更优的耐腐蚀性。
Abstract
In order to investigate the high-temperature corrosion characteristics of a new type of low melting point ternary mixed nitrate, this paper adopts the weight loss method to study the static corrosion behavior of 347H and 316L stainless steel in ternary nitrate at two temperatures of 500 ℃ and 550 ℃. The results show that with the increase of corrosion temperature, the corrosion rate of 347H and 316L stainless steel increases; At the same temperature, as the soaking time increases, the weight loss of 347H and 316 L stainless steel increases, while the corrosion rate decreases. The corrosion rates of 347H stainless steel and 316L stainless steel after 1000 hours of corrosion at 550 ℃ are 0.0313 mm/a and 0.04439 mm/a, respectively. Under the same corrosion time, 347H stainless steel exhibits better corrosion resistance.
关键词
太阳能热发电 /
熔盐 /
硝酸盐 /
腐蚀 /
腐蚀速率 /
低熔点 /
不锈钢
Key words
solar thermal power generation /
molten salt /
nitrate /
corrosion /
corrosion rate /
low-melting /
stainless steel
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基金
国家重点研发计划（2022YFB4202402）; 中能建数字科技集团有限公司科技项目（CEECSK-2022-KJ01）
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