Coating density as the key factor behind hydrogen embrittlement of cadmium-plated 4340 steel

被引：6

作者：

Bellemare, J. ^{[1
]}

Laliberte-Riverin, S. ^{[1
]}

Menard, D. ^{[1
]}

Brochu, M. ^{[1
]}

Sirois, F. ^{[1
]}

机构：

[1] Polytech Montreal, Montreal, PQ H3C 3A7, Canada

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2020年 / 50卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Thermal desorption spectroscopy; Sustained-load test; 4340; steel; Coating density; Cadmium evaporation; Hydrogen embrittlement; STRENGTH; ELECTRODEPOSITION; PLASTICITY; FRACTURE; STRESS; NI;

D O I：

10.1007/s10800-020-01458-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The aerospace industry uses 200-h sustained-load test (SLT), described in ASTM F-519, to evaluate hydrogen embrittlement (HE) of their 4340 steel electroplated parts. The cadmium plating used in ASTM F-519 suggest that the coating density may affect HE in an important manner. Therefore, in this work, 4340 steel notched bars were plated with five different cadmium coating densities. Then, the SLT was combined with thermal desorption spectroscopy (TDS) to evaluate: (i) the degree of HE, and (ii) the hydrogen content of the cadmium-plated 4340 steel samples. The results show strong evidences that the major factor causing HE of cadmium-plated 4340 steel is the coating density. Moreover, an advanced analysis of TDS curves using the Hertz-Knudsen equation allows distinguishing hydrogen in steel from hydrogen in the cadmium coating. The advanced analysis also gives an estimation of the coating density, and therefore indicates if the baking will be effective at relieving embrittlement. Finally, TDS could be a good complementary tool to the SLT in evaluating HE. Graphic abstract

引用

页码：1045 / 1058

页数：14

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