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Effect of Aging Heat Treatment on Pitting Corrosion Resistance of Martensitic Stainless Steel

تأثير المعالجة الحرارية بالتعتيق في مقاومة التآكل الكيميائي النقري للفولاذ المارتنسيتي المقاوم للصدأ

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 Publication date 2015
and research's language is العربية
 Created by Shamra Editor




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The aim of this work is to study the effect of the aging heat treatment on the pitting corrosion resistance of martensitic stainless steel. In this research a number of specimens from martensitic stainless steel were subjected to solution treatment at 1050 for one hour followed by water quenching then aging in the temperatures range (400-750) for different holding times (1-16 hrs). After heat treatment, two types of corrosion tests (accelerated test and immersion test) were conducted. The results obtained in this research showed that the pitting corrosion resistance was affected by Aging temperature and three critical temperatures were found in corrosion test: the specimens aged at 475 0C had maximum corrosion rate. This may be due to the presence of stringer δ- ferrite and precipitation of very fine precipitates which precipitated heterogeneously in the martensitic matrix, which led to an increase in corrosion rate. The specimens aged at temperatures range (550 – 625) 0C had minimum values of corrosion rate, this is attributed to the high volume fraction of retained austenite. The specimens aged at temperatures above 625 had intermediate corrosion rate. The type of pits, which resulted from two pitting corrosion tests, was independent form the form of δ-ferrite and carbides which presence in microstructure.


Artificial intelligence review:
Research summary
تتناول هذه الورقة البحثية تأثير عملية التبريد والتسخين على خصائص الفولاذ المقاوم للصدأ من نوع AISI 403. يتم التركيز على تأثير درجات الحرارة المختلفة على البنية المجهرية والخصائص الميكانيكية للفولاذ. تم استخدام تقنيات مختلفة مثل XRD وSEM لتحليل البنية المجهرية وتحديد التغيرات في تكوين الكربيدات مثل Cr23C6. كما تم اختبار مقاومة التآكل باستخدام محلول FeCl3. ووجد أن درجة حرارة التبريد والتسخين تؤثر بشكل كبير على تكوين الكربيدات وبالتالي على الخصائص الميكانيكية والمقاومة للتآكل للفولاذ المقاوم للصدأ.
Critical review
دراسة نقدية: تقدم الورقة البحثية تحليلاً شاملاً لتأثير درجات الحرارة على الفولاذ المقاوم للصدأ، ولكن كان من الممكن أن تكون الدراسة أكثر شمولية إذا تم تضمين تأثير عوامل أخرى مثل الضغط والبيئة الكيميائية المختلفة. كما أن استخدام تقنيات تحليل إضافية مثل TEM قد يوفر رؤية أعمق للبنية المجهرية. بالإضافة إلى ذلك، كان من الممكن تحسين العرض البياني للنتائج لتكون أكثر وضوحًا وسهولة في الفهم.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو دراسة تأثير درجات الحرارة المختلفة على البنية المجهرية والخصائص الميكانيكية للفولاذ المقاوم للصدأ من نوع AISI 403.

  2. ما هي التقنيات المستخدمة لتحليل البنية المجهرية؟

    تم استخدام تقنيات XRD وSEM لتحليل البنية المجهرية وتحديد التغيرات في تكوين الكربيدات.

  3. ما هو تأثير درجة حرارة التبريد والتسخين على الفولاذ؟

    تؤثر درجة حرارة التبريد والتسخين بشكل كبير على تكوين الكربيدات مثل Cr23C6 وبالتالي على الخصائص الميكانيكية والمقاومة للتآكل للفولاذ.

  4. ما هي الاختبارات التي تم استخدامها لتقييم مقاومة التآكل؟

    تم استخدام محلول FeCl3 لاختبار مقاومة التآكل للفولاذ المقاوم للصدأ.


References used
B. Tzaneva, “Effect Of pH ON The Corrosion Behaviour Of High Nitrogen Stanless Steel In Chloride Medium,” Journal of Chemical Technology and Metallurgy, 48, 4, 2013,pp 383- 390
R. C. Newman, “Understanding the Corrosion of Stainless Steel,” Corrosion, Vol. 57, No.12, Dec., 2001, pp1030-1041
. B. Miao, et al., “Microstructure of Tempered AISI 403 Stainless Steel,” Material Science and Engineering, A171, 1993, pp 21-33
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