Research on Two Traditional Cyclic Corrosion Test

2022 ◽  
pp. 1263-1271
Author(s):  
Yichuan Xiao ◽  
Yan He ◽  
Jing Wang
Keyword(s):  
Corrosion Test ◽  
Cyclic Corrosion

Assessment of Cyclic Corrosion Test Protocols for Magnesium Substrates

2018 ◽  
Vol 11 (4) ◽  
pp. 481-490
Author(s):  
J.P. Weiler ◽  
G. Wang ◽  
R. Berkmortel
Keyword(s):  
Corrosion Test ◽  
Cyclic Corrosion

Corrosion Behavior of Organic Composite Coated Steel Sheet during Cyclic Corrosion Test

1998 ◽  
Vol 84 (11) ◽  
pp. 777-784 ◽  
Author(s):  
Shigeko SUJITA ◽  
Kazuo MOCHIZUKI ◽  
Nobuyuki MORITO
Keyword(s):  
Corrosion Behavior ◽  
Corrosion Test ◽  
Steel Sheet ◽  
Coated Steel ◽  
Cyclic Corrosion ◽  
Coated Steel Sheet

Crevice Corrosion and Cracking Behavior of Cold Rolled Type 304 Stainless Steel in Chloride Environment

2009 ◽  
Vol 1226 ◽  
Author(s):  
Shunji Kajikawa ◽  
Yasuaki Isobe ◽  
Masazumi Okido
Keyword(s):  
Stainless Steel ◽  
Corrosion Test ◽  
High Strength ◽  
Corrosion Property ◽  
Sea Salt ◽  
Corrosive Environment ◽  
Salt Damage ◽  
Cyclic Corrosion ◽  
Cold Rolled ◽  
Corrosion Pit

AbstractThe salt damage such as the snow melting salts in winter or the sea salt particle flying in the coast region has significant effect on the corrosive environment of the automobile. Moreover, the corrosive environment of the automobile become more severe by the wet/dry cyclic condition, for example, a car gets wet with the splash water and dryness by the thermal loading while driving. On the other hand, the further application of the high strength stainless steel to the automobile parts is expected because it can contribute durability and lightening. Then, it is important to clarify the corrosion characteristic of this material under the salt damage environment. In this study cold rolled type304 stainless steel pipe with shot peening were used to investigate the corrosion property of high strength type304 stainless steel for automotive applications in a salt damage environment. The hardness of the pipe was about HV450, and a clear difference was not admitted in the thickness direction. A crevice was created between the outside of the pipe and an O-ring, and the pipe was applied stress by press fitting of another part. The corrosion property of the sample was evaluated in an automotive field test in Okinawa. Cracking from a corrosion pit was observed in the crevice. The Electron Prove Micro Analysis（EPMA） indicated that pitting corrosion was caused by chloride (from sea salt) concentrated in the crevice. The crack occurred in the residual compressive stress layer created by shot peening. In this regard, it was confirmed by the XRD analysis that about 85% of the metallographic structure had been transformed into the martensite. And the observation of the metallographic structure by the Electron Back Scatter Diffraction（EBSD） clarified the crystal grain was greatly transformed by the strong processing. It means that the accumulation of strain occurred. These two factors are considered to raise the receptivity to the crack generation of this sample. A crack generated at a corrosion pit was reproduced in a wet/dry cyclic corrosion test after one flash of artificial seawater. To investigate the crack generating mechanism, a corrosion pit was previously generated on the sample by cyclic corrosion test, after which a cathodic charge test in artificial sea water was done. Similar cracking from a corrosion pit was observed on the sample after this test. Therefore, the cracking is presumed to be Hydrogen Embrittlement-Stress Corrosion Cracking（HE-SCC）

scholarly journals Corrosion Behavior of SMA490BW Steel and Welded Joints for High-Speed Trains in Atmospheric Environments

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3043 ◽  
Author(s):  
Xiangyang Wu ◽  
Zhiyi Zhang ◽  
Weichuang Qi ◽  
Renyong Tian ◽  
Shiming Huang ◽  
...  
Keyword(s):  
Weight Loss ◽  
Corrosion Behavior ◽  
Welded Joints ◽  
Corrosion Test ◽  
High Speed ◽  
Loss Rate ◽  
Corrosion Potential ◽  
Weight Loss Rate ◽  
Cyclic Corrosion ◽  
High Speed Trains

Currently, high-speed trains work under various atmospheric environments, and the bogie as a key component suffers serious corrosion. To investigate the corrosion behavior of bogies in industrial atmospheric environments, the periodic immersion wet/dry cyclic corrosion test for SMA490BW steel and automatic metal active gas (MAG) welded joints used for bogies was conducted in the present work. Corrosion weight loss rate, structure, and composition of rust layers as well as electrochemistry parameters were investigated. The results showed that the corrosion weight loss rate decreased with increasing corrosion time; furthermore, the corrosion weight loss rate of the welded joints was lower than that of SMA490BW steel. The XRD results showed that the rust layers formed on SMA490BW steel and its welded joints were mainly composed of α-FeOOH, γ-FeOOH, Fe2O3, and Fe3O4. The observation of surface morphology indicated that the rust layers of the welded joints were much denser and had a much finer microstructure compared with those of SMA490BW steel. After corrosion for 150 h, the corrosion potential of the welded joints with rust layers was higher than that of SMA490BW steel. In short, the welded joints exhibited better corrosion resistance than SMA490BW steel because of the higher content of alloy elements, as shown in this work.

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