Film-forming amines have been widely used in thermal power plants for maintenance after shutdown, and there are more and more applications and researches in nuclear power secondary circuits for this purpose. However, in the direction of stress corrosion cracking, there is not much research on the influence of film-forming amines on metal materials. This article uses the high temperature slow strain rate test (SSRT) method to evaluate the influence of a commercial film-forming amine on the stress corrosion cracking behavior of two conventional island materials for PWR nuclear power plants. These two metal materials are the heat exchange tube materials of the high-pressure heater and steam generator in the high-temperature operation area of the secondary circuit of a nuclear power plant: TP 439 stainless steel and 690 TT alloy. The test analyzed the mechanical properties and fracture morphology. The test results show that in the test concentration range (<5 mg/kg), the film-forming amine will not affect the SCC of TP 439 stainless steel and 690 TT alloy under the condition of slow strain rate. The behavior has a significant impact. In practical applications, the general dosage of film-forming amine is 1-2 mg/kg. This data is lower than the film-forming amine concentration used in the experiment. Therefore, there is no need to worry about the obvious impact on the SCC behavior of TP 439 stainless steel and 690 TT alloy.

中文翻译：

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TP 439和690 TT在成膜胺环境下的应力腐蚀开裂行为

成膜胺已广泛应用于火电厂停堆检修，为此在核电二次回路中的应用和研究越来越多。但在应力腐蚀开裂方向，成膜胺类对金属材料的影响研究不多。本文采用高温慢应变速率试验（SSRT）方法，评价一种商用成膜胺对压水堆核电站两种常规岛材料应力腐蚀开裂行为的影响。这两种金属材料是核电站二回路高温运行区高压加热器和蒸汽发生器的换热管材料：TP 439不锈钢和690 TT合金。试验分析了力学性能和断口形貌。试验结果表明，在试验浓度范围内(<5 mg/kg)，成膜胺在慢应变速率条件下不会影响TP 439不锈钢和690 TT合金的SCC。行为具有重大影响。在实际应用中，成膜胺的一般用量为1-2mg/kg。该数据低于实验中使用的成膜胺浓度。因此，不必担心对 TP 439 不锈钢和 690 TT 合金的 SCC 行为有明显影响。行为具有重大影响。在实际应用中，成膜胺的一般用量为1-2mg/kg。该数据低于实验中使用的成膜胺浓度。因此，不必担心对 TP 439 不锈钢和 690 TT 合金的 SCC 行为有明显影响。行为具有重大影响。在实际应用中，成膜胺的一般用量为1-2mg/kg。该数据低于实验中使用的成膜胺浓度。因此，无需担心对 TP 439 不锈钢和 690 TT 合金 SCC 行为的明显影响。