Microstructure and Corrosion Behaviour of the Car Steels in Chloride Contained Environments
محل انتشار: مجله علوم و مهندسی خوردگی، دوره: 12، شماره: 43
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 59
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شناسه ملی سند علمی:
JR_ICAC-12-43_002
تاریخ نمایه سازی: 5 آذر 1402
چکیده مقاله:
The DP۹۸۰, DP۵۹۰, and IF steels are used in the construction of car bodies due to their unique mechanical
properties. In this paper, the corrosion behavior and microstructure of the DP۹۸۰, DP۵۹۰, and IF steels which are
used in the automotive industry are investigated and evaluated. In order to evaluate the corrosion behavior of all
three alloys, the electrochemical impedance spectroscopy and potentiodynamic polarization were evaluated in ۰.۱
M NaCl + ۰.۱ M H۲SO۴ and ۰.۱ M NaCl + ۰.۱ M NaOH environments. The corrosion evaluations of all three
alloys show much better corrosion behavior in the alkaline environment than in the acidic environment due to the
formation of the passive layer. While these alloys show much less corrosion resistance in the ۰.۱ M NaCl + ۰.۱
M H۲SO۴ environment, the uniform corrosion occurs while there is no evidence of the passive layer formation.
The DP۹۸۰ and DP۵۹۰ dual-phase steels show lower corrosion resistance than the IF steel due to the presence of
the ferrite and martensite phases and the possibility of galvanic cell formation at the interface between the two
phases. The DP۹۸۰ dual-phase steel has a better corrosion behavior than the DP۵۹۰ due to the lower martensite
content in both acidic and alkaline solutions, but the corrosion behavior of these two sheets of steel is very close
to each other
کلیدواژه ها:
Corrosion ، Microstructure ، Chloride contained environments ، Electrochemical impedance
spectroscopy ، Potentiodynamic polarization ، خوردگی ، ریزساختار ، محیط های کلریدی ، فولاد خودرو ، طیف سنجی امپدانس الکتروشیمیایی ، پلاریزاسیون پتانسیودینامیک