تاثیر عملیات حرارتی روی رفتار الکتروشیمیایی سطح آلیاژ برنز آلومینیوم-نیکل (C95500)

نوع مقاله : علمی و پژوهشی

نویسندگان

1 حکیم سبزواری

2 سبزوار

چکیده

اثر عملیات حرارتی آلیاژ برنز آلومینیوم نیکل ( C95500) روی فعل و انفعالات کاتدی سطح و رفتار خوردگی آن در محلول 3.5% NaCl با استفاده از تست‌های الکتروشیمیایی مطالعه شده است. آلیاژ در سیکل های عملیات حرارتی متفاوتی به پیشنهاد صنعت شامل کوئینچ، نرماله و پیرسازی عملیات حرارتی شدند. میکروساختار نمونه‌ها با استفاده از میکروسکوپ‌های نوری مورد مطالعه قرار گرفته است. تستهای پلاریزاسیون اثبات می‌کند که با افزایش زمان غوطه‌وری و تشکیل لایه محافظ، فعالیت کاتدی که تحت کنترل نفوذ اکسیژن است کاهش می‌یابد که این عامل به افزایش مقاومت به خوردگی کمک می‌کند. منحنی های پلاریزاسیون نشان دادند که رفتار پلاریزاسیون آندی برای همه نمونه‌ها تقریباً یکسان است، این موضوع نشان می‌دهد که رفتار نمونه‌های عملیات حرارتی شده تحت کنترل اکتیواسیون است. همچنین رفتار متفاوت پلاریزاسیون کاتدی اثبات می کند که آلیاژ تحت کنترل نفوذ نیز می‌باشد و همین موضوع نشان دهنده افزایش یا کاهش مقاومت به خوردگی سطح شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of Heat Treatment on the Electrochemical Behavior of Nickel Aluminum Bronze Alloy (C95500

نویسندگان [English]

  • abbas abbasian 1
  • ali davoodi 1
  • bahman koroji 2
1 hakim sabzevari
2 hakim sabzevari
چکیده [English]

The effect of heat treatment of nickel-aluminum bronze alloy on the interaction of the cathodic surface and its corrosion behavior in 3.5% NaCl solution is studied. The alloy was studied under different industrially recommended heat treatments, including quenching, normalizing and aging heat treatments. The microstructure of the specimens was studied by optical microscopy. Polarization tests proved that with increasing immersion time, and the formation of the protective layer, helps extend the oxygen-diffusion controlled cathodic reactions and also increase corrosion resistance. Polarization curves showed that the anodic polarization behavior is almost the same for all samples, which suggests that activation is controlled by the heat treatment of the samples. The different behavior under the influence of cathodic polarization proves that the alloy also reflects the increase or decrease in the level of corrosion resistance.

کلیدواژه‌ها [English]

  • corrosion
  • Potentiodynamic Polarisation
  • Nickel-Aluminum Bronze Alloy
  • Heat treatment
  • Microstructure
  • 3.5% NaCl Solution

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