Corrosion Resistance of Muffler Materials in Automotive Exhaust Gas Condensates.

Ujiro, Takumi; Kitazawa, Makoto; Satoh, Susumu

doi:10.2472/jsms.45.1192

Cited by 12 publications

(10 citation statements)

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“…The cyclic corrosion test was applied to evaluate the corrosion resistance and predict the service life of stainless steels used in automotive exhaust systems. There always have two standard methods, that is, Mazda and JFE, to test the corrosion resistance of stainless steels . While, in the present study, the Mazda was chosen as the cyclic corrosion test method according to the actual corrosion environment of the exhaust system in passenger cars.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…At the hot end, the working temperatures of exhaust system parts such as exhaust manifold, front pipe, and catalytic converter are usually higher than 600 °C, and thus good heat resistance is required for the materials . Additionally, at the cold end of the exhaust system, the corrosive condensate of exhaust gas could cause the occurrence of pitting perforation in muffler . Regarding the requirements for high quality guarantee and lightweight design, stainless steels were used in automotive exhaust systems.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Nb on the Performance of 409 Stainless Steel for Automotive Exhaust Systems

Li¹,

Zhang

Wang³

et al. 2018

steel research int.

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In this article, the performance of Ti single‐stabilized 409 ferritic stainless steel and Ti–Nb dual‐stabilized 409 ferritic stainless steels with Nb contents of 0.15 and 0.3 wt% are studied to develop low‐cost ferritic stainless steel for automotive exhaust systems. The results show that the performance of dual‐stabilized 409 Ti–Nb stainless steels is superior to 409Ti stainless steel in condensed liquid corrosion resistance, high temperature strength, and high temperature fatigue resistance. The investigation of mechanisms indicates that the refinement of inclusions by Nb addition can enhance the corrosion resistance significantly, and the better high‐temperature performance, that is, strength and fatigue resistance, can also be attributed to the precipitation of NbC.

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Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Nb on the Performance of 409 Stainless Steel for Automotive Exhaust Systems

Li¹,

Zhang

Wang³

et al. 2018

steel research int.

View full text Add to dashboard Cite

show abstract

“…엔진의 성능향상 1) , 배기 유해 가스 감소 2) , 자동차 보증 기간의 확대 [2][3][4] 요구 이외에 머플러의 심한 부식 환경 5) 때 문에 Al-coated 탄소강의 대체재로 페라이트계 스테인리 스강(type 409L, type 439, type 436L) 5) 이 머플러 재료 로 개발되었다. 개발된 스테인리스강 중에서 높은 경제성과 요구 수준이상의 내식성을 지닌 11 wt% 크롬을 함유하는 type 409L이 머플러 재료로 현재 가장 많이 사용되고 있다.…”

Section: 서 론unclassified

Effect of Silicon on Intergranular Corrosion Resistance of Ti-stabilized 11 wt% Cr Ferritic Stainless Steels

Hyun¹,

Kim²

2013

Corrosion Science and Technology

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Ti-stabilized 11 wt% Cr ferritic stainless steels (FSSs) for automotive exhaust systems have been experienced intergranular corrosion (IC) in some heat-affected zone (HAZ). The effects of sensitizing heat-treatment and silicon on IC were studied. Time-Temperature-Sensitization (TTS) curves showed that sensitization to IC was observed at the steels heat-treated at the temperature lower than 650oC and that silicon improved IC resistance. The sensitization was explained by chromium depletion theory, where chromium is depleted by precipitation of chromium carbide during sensitizing heat-treatment. It was confirmed with the results from the analysis of precipitates as well as the thermodynamical prediction of stable phases. In addition, the role of silicon on IC was explained with the stabilization of grain boundary. In other words, silicon promoted the formation of the grain boundaries with low energy where precipitation was suppressed and consequently, the formation of Cr-depleted zone was retarded. The effect of silicon on the formation of grain boundaries with low energy was proved by the analysis of coincidence site lattice (CSL) grain boundary, which is a typical grain boundary with low energy.

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“…As a part exposed under the automobile chassis, the automobile exhaust not only contacts the automobile exhaust and its condensate but also inevitably contacts with other corrosive media in the external environment, especially the ground snow melting salt in winter. Therefore, ferritic stainless steel for automobile exhaust systems also needs good corrosion resistance [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of arc remelting on microstructure and pitting corrosion resistance of 441 ferritic stainless steel

Zhu¹,

Wang²,

Yan³

2023

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In this paper, the large area plate of arc-remelted metal of 441 ferritic stainless steel is prepared by multi-arc remelting. The pitting corrosion resistance of base metal and arcremelted metal is compared through the pitting corrosion immersion test. The microstructure changes of 441 ferritic stainless steel after arc remelting and its influence on pitting corrosion resistance are studied through metallographic structure observation, precipitate analysis and corrosion pit surface observation and analysis. The results show that, compared with the base metal, the grains of arc remelted metal structure grow abnormally and form coarse ferrite columnar structure; there are large particles of carbonitride precipitates of Ti and Nb, and small particles of Laves precipitates containing Nb in the base metal, and the precipitates in the arc remelted metal are smaller and more evenly distributed, most of which are composite precipitates of Nb and Ti. The corrosion rate of base metal is 23.4 g m −2 h −1 . After arc remelting, the corrosion rate of metal is 20.88 g m −2 h −1 , and the pitting corrosion resistance is improved. K e y w o r d s : 441 ferritic stainless steel, pitting corrosion, arc remelting, precipitate

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Corrosion Resistance of Muffler Materials in Automotive Exhaust Gas Condensates.

Cited by 12 publications

References 0 publications

Effect of Nb on the Performance of 409 Stainless Steel for Automotive Exhaust Systems

Effect of Nb on the Performance of 409 Stainless Steel for Automotive Exhaust Systems

Effect of Silicon on Intergranular Corrosion Resistance of Ti-stabilized 11 wt% Cr Ferritic Stainless Steels

Effect of arc remelting on microstructure and pitting corrosion resistance of 441 ferritic stainless steel

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