The aim of this work is to characterize the oxide layer structure of Alloy 690TT in high-temperature water with different dissolved hydrogen (DH) contents by using an X-ray photoelectron spectroscopy. Under the low DH contents (0.4494–0.8988 mg/kg), the oxide layers were composed of an outermost layer of Ni(OH)2 and Cr(OH)3 enriched in Ni, an intermediate layer of hydroxides and oxides enriched in Cr, and an inner Cr2O3 layer. Outermost NiO coexists with small amount of Cr2O3 layer, while in the inner oxide only Cr2O3 remains. The oxide layers at medium and high DH contents (3.1458– 8.9880 mg/kg) consisted of an outermost layer of Ni(OH)2 and Cr(OH)3 enriched in Cr, an intermediate layer of metallic Ni, hydroxides and oxides enriched in Cr, and an inner Cr2O3 layer. In addition, boron compounds containing B3+ ions were accumulated in the thick and porous NiO layer formed at low DH contents, whereas the accumulation of boron compounds did not occur in the thin and dense polyhedral oxide layer formed at medium and high DH contents.

中文翻译：

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氢含量对 690TT 合金氧化行为的影响及高温水中氧化物中相关硼的积累

这项工作的目的是通过使用 X 射线光电子能谱来表征合金 690TT 在具有不同溶解氢 (DH) 含量的高温水中的氧化层结构。在低 DH 含量 (0.4494–0.8988 mg/kg) 下，氧化物层由富含 Ni 的 Ni(OH)2 和 Cr(OH)3 的最外层，富含 Cr 的氢氧化物和氧化物的中间层组成，和内部 Cr2O3 层。最外层的 NiO 与少量的 Cr2O3 层共存，而在内层氧化物中只剩下 Cr2O3。中高 DH 含量 (3.1458–8.9880 mg/kg) 的氧化物层由富含 Cr 的 Ni(OH)2 和 Cr(OH)3 的最外层、富含 Cr 的金属 Ni、氢氧化物和氧化物的中间层组成。 Cr 和内部 Cr2O3 层。此外，