The intergranular corrosion behavior of 6000-series alloys with different Mg/Si and Cu content

2017 ◽  
Vol 405 ◽  
pp. 489-496 ◽  
Author(s):  
Yun Zou ◽  
Qing Liu ◽  
Zhihong Jia ◽  
Yuan Xing ◽  
Lipeng Ding ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Cu Content

Influence of Sc Addition on the Corrosion Behavior of Medium Strength Al-Zn-Mg Alloy

2018 ◽  
Vol 913 ◽  
pp. 439-444 ◽  
Author(s):  
Zhao Ming Li ◽  
Hai Chang Jiang ◽  
Yun Li Wang ◽  
Duo Zhang ◽  
De Sheng Yan ◽  
...  
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Relative Weight ◽  
Mg Alloy ◽  
Exfoliation Corrosion ◽  
Medium Strength ◽  
Relative Weight Loss ◽  
Sc Addition

In this paper, the effect of Sc addition (0.06 wt%) on the corrosion behavior of medium strength Al-Zn-Mg alloy is investigated by mass loss measurements, electrochemical experiment, intergranular corrosion and exfoliation corrosion tests. The results indicate the addition of Sc reduces the relative weight loss and enhances pitting performance as a result of grain refinement. The improved intergranular corrosion and exfoliation corrosion resistance caused by minor Sc addition are mainly attributed to the delay in both the initiation and advance stages of local corrosion.

Effect of the Cu Content on the Microstructure and Corrosion Behavior of PEO Coatings on Al–xCu Alloys

2018 ◽  
Vol 165 (9) ◽  
pp. C469-C483 ◽  
Author(s):  
Liye Zhu ◽  
Wei Zhang ◽  
Tao Zhang ◽  
Ji Qiu ◽  
Jingyi Cao ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Cu Content ◽  
Peo Coatings

Shielded metal arc welding of AISI 409M ferritic stainless steel: study on mechanical, intergranular corrosion properties and microstructure analysis

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sachin Ambade ◽  
Chetan Tembhurkar ◽  
Awanikumar P. Patil ◽  
Prakash Pantawane ◽  
Ravi Pratap Singh
Keyword(s):  
Corrosion Behavior ◽  
Heat Input ◽  
Intergranular Corrosion ◽  
Arc Welding ◽  
High Heat ◽  
Shielded Metal Arc Welding ◽  
Corrosion Properties ◽  
Content Type ◽  
Welding Heat Input ◽  
Metal Arc Welding

Purpose The purpose of this study is on AISI 409 M ferritic stainless steel (FSS) which is developing a preferred choice for railway carriages, storage tanks and reactors in chemical plants. The intergranular corrosion behavior of welded SS 409 M has been studied in H2SO4 solution (0.5 M) with the addition of NH4SCN (0.01 M) with different heat input. As this study is very important in context of various chemical and petrochemical industries. Design/methodology/approach The microstructure, mechanical properties and intergranular corrosion properties of AISI 409 M FSS using shielded metal arc welding were investigated. Shielded metal arc welding with different welding current values are used to change the heat input in the joints resulted in the microstructural variations. The microstructure of the welded steel was carefully inspected along the width of the heat-affected zone (HAZ) and the transverse-section of the thin plate. Findings The width of heat affected zone (3.1,4.2 and 5.8 mm) increases on increasing the welding heat input. Due to change in grain size (grain coarsening) as HAZ increased. From the microstructure, it was observed that the large grain growth which is dendritic and the structure become finer to increase in welding heat input. For lower heat input, the maximum microhardness value (388HV) was observed compared with medium (351 HV) and higher heat input (344 HV), which is caused by a rapid cooling rate and the depleted area of chromium (Cr) and nickel (Ni). The increase in weld heat input decreases tensile strength, i.e. 465 MPa, 440 MPa and 418 MPa for low, medium and high heat input, respectively. This is because of grain coarsening and chromium carbide precipitation in sensitized zone and wider HAZ. The degree of sensitization increases (27.04%, 31.86% and 36.08%) to increase welding heat input because of chromium carbide deposition at the grain boundaries. The results revealed that the higher degree of sensitization and the difference in intergranular corrosion behavior under high heat input are related to the grain growth in the HAZ and the weld zone. Originality/value The study is based on intergranular corrosion behavior of welded SS 409 M in H2SO4 solution (0.5 M) with the addition of NH4SCN (0.01 M) with different heat input which is rarely found in literature.

Intergranular Corrosion Behavior of 00Cr12 Ferritic Stainless Steels Containing Cerium

2013 ◽  
Vol 690-693 ◽  
pp. 133-138
Author(s):  
Ya Bo Li ◽  
Fu Ming Wang ◽  
Xiao Nong Cheng
Keyword(s):  
Grain Boundary ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
Intergranular Corrosion ◽  
Optical Microscope ◽  
Mechanism Analysis ◽  
Chromium Depletion ◽  
Ferritic Stainless Steels ◽  
Boundary Density ◽  
Grain Sizes

Intergranular corrosion behavior of 00Cr12 ferritic stainless steels with different amounts cerium was evaluated. For this evaluation, electrochemical measurements - polarization curves - were obtained for tested materials, and optical microscope was used to observe corrosive microstructure. Experimental results shows: cerium reduces grain sizes and improves intergranular corrosion resistance of test materials. Through mechanism analysis: cerium reduces grain sizes, increases grain boundary density, therefore might improve distribution aspects of carbides and nitrides, chromium depletion situation near grain boundary would be improved, this work worth further study.

scholarly journals Erratum to: Intergranular Corrosion Behavior of 304LN Stainless Steel Heat Treated at 623 K (350 °C)

2013 ◽  
Vol 44 (7) ◽  
pp. 3419-3419 ◽  
Author(s):  
Raghuvir Singh ◽  
Mukesh Kumar ◽  
Mainak Ghosh ◽  
Gautam Das ◽  
P. K. Singh ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Heat Treated ◽  
304Ln Stainless Steel ◽  
Stainless Steel Heat ◽  
Steel Heat

Influence of the Nickel on the Corrosion Behavior of Al-Mg-Sc-Zr Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 1123-1128
Author(s):  
W.T. Zhao ◽  
De Sheng Yan ◽  
Li Jian Rong
Keyword(s):  
Corrosion Behavior ◽  
Intergranular Corrosion ◽  
Intermetallic Phase ◽  
Morphological Characteristics ◽  
Localized Corrosion ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Exfoliation Corrosion ◽  
Β Phase ◽  
Zr Alloy

The corrosion behavior of cold worked Al-Mg-Sc-Zr-Ni alloys prepared by vacuum induction melting in acidic chloride solution was studied. The morphological characteristics of the corroded specimens were examined by OM(optical microscopy), SEMand EDX techniques. The results indicated that the intergranular and exfoliation corrosion susceptibility dramatically depended on the Ni content. The Al-Mg-Sc-Zr alloy with 0 and 0.5 wt.% Ni were lightly susceptible to intergranular corrosion as the precipitation of Mg2Al3 phases presented at grain boundaries and the Al3Ni particles were finely dispersive. The intergranular corrosion was enhanced by the Al3Ni particles enrichment and became pitting corrosion with increasing Ni to 1.0 wt.%. Finally, the exfoliation corrosion happened to the alloy with 2.0wt.% Ni. This trend correlated well with the electrochemical property and distribution of Al3Ni phases. The corrosion potential of Al3Ni intermetallic phase is nobler than the β phase and the matrix, which result in an appearance of galvanic coupling. In addition, the increase of Al3Ni particles enlarged the attack area and the inhomogeneous segments of Al3Ni and Al3Mg2 phases accelerated the localized corrosion.

Intergranular Corrosion Behavior of Low-Nickel and 304 Austenitic Stainless Steels

2016 ◽  
Vol 25 (9) ◽  
pp. 3615-3626 ◽  
Author(s):  
Ankur V. Bansod ◽  
Awanikumar P. Patil ◽  
Abhijeet P. Moon ◽  
Nilay N. Khobragade
Keyword(s):  
Corrosion Behavior ◽  
Stainless Steels ◽  
Intergranular Corrosion ◽  
Austenitic Stainless Steels

Influence of Impurities on Intergranular Corrosion of Extra High Purity Austenitic Stainless Steels

2009 ◽  
Author(s):  
Ikuo Ioka ◽  
Jun Suzuki ◽  
Takafumi Motoka ◽  
Kiyoshi Kiuchi ◽  
Junpei Nakayama
Keyword(s):  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
High Purity ◽  
Intergranular Corrosion ◽  
Active Sites ◽  
Degradation Mechanism ◽  
Austenitic Stainless Steels ◽  
Hno3 Solution ◽  
Nuclear Fuel Reprocessing Plant

An intergranular corrosion is observed in austenitic stainless steels exposed to high temperature, concentrated nitric acid (HNO3) solution with highly oxidizing ions. It is an important degradation mechanism of austenitic stainless steels for use in a nuclear fuel reprocessing plant. The intergranular corrosion is caused by the segregation of impurities to grain boundaries and the resultant formation of active sites. Extra High Purity (EHP™) austenitic stainless steel was developed with conducting the new multiple refined melting in order to suppress the total harmful impurities less than 100ppm. The intergranular corrosion behavior of EHP alloys with various impurities was examined in boiling HNO3 solution with highly oxidizing ions to find a correlation between the intergranular corrosion and the impurities of EHP alloys. A good correlation was confirmed between the degree of intergranular corrosion and the corrosion rate. The relationships between the corrosion rate and the impurities content of EHP alloys was determined using a multiple regression analysis. The influence on corrosion rate became small in order of B, P, Si, C, S and Mn. It was important to control B in intergranular corrosion behavior of EHP alloys.

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