在模拟压水堆一回路水条件下,用静态高压釜分别对304L和304NG不锈钢进行了1680h的腐蚀考验,对氧化膜进行了宏观和微观分析,对均匀腐蚀和均匀腐蚀速率进行了定量评估,结果如图1、2所示。从图1可看出,304L不锈钢在很短的时间内(14d)就形成了氧化物层。氧化物分为两层,最靠近基体的氧化物颗粒直径为50～100nm,在细小致密的氧化物颗粒表面均匀分布着0.5～1.6μm的 Under the condition of the first circuit of the simulated PWR, the 304L and 304NG stainless steel were respectively subjected to 1680h corrosion test with static autoclave. The oxide film was analyzed macroscopically and microscopically, and the uniform corrosion and uniform corrosion rate were quantitatively evaluated. The results shown in Figure 1,2. As can be seen from Figure 1, the 304L stainless steel forms an oxide layer in a very short period of time (14 days). The oxide is divided into two layers, and the oxide particle closest to the substrate has a diameter of 50 to 100 nm. On the surface of the fine and compact oxide particles, 0.5 to 1.6 μm