Study on corrosion mechanism of the low-GWP fluorinated gas HFO-1234yf with magnesium alloy AZ80A

被引：4
|
作者：
Huang, Xin [1 ]
Bai, Huilin [1 ]
Zhou, Xiaomeng [1 ]
机构：
[1] Civil Aviat Univ China, Key Lab Civil Aviat Thermal Hazards Prevent & Emer, Tianjin 300300, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2023年 / 150卷
关键词：
Low-GWP fluorinated gas; HFO-1234yf; Magnesium alloy; Corrosion; WORKING FLUID; FLUORIDE; DECOMPOSITION; STABILITY; DYNAMICS;
D O I：
10.1016/j.engfailanal.2023.107202
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
HFO-1234yf, as an alternative to traditional refrigerants and halon fire extinguishing agents, is environmentally friendly and low toxic. In this study, the corrosion behavior of HFO-1234yf to magnesium alloy materials was studied at high temperature. The result shows HFO-1234yf without pyrolysis is compatible with AZ80A alloy and has no corrosive effect on AZ80A alloy. The HFO-1234yf pyrolyzed at 400 degrees C to produce C4 products and HF. The corrosion of the alloy surface by HF caused the formation of MgF2, which caused increased mass and decreased ultimate tensile strength of AZ80A.On this basis, corrosion products and gaseous products were further analyzed, and the corrosion mechanism of HFO-1234yf on magnesium alloy at high temperature was explained. The results are helpful for the safe application of HFO-1234yf and screening of Halon substitute agents.
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页数：12
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