مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

بررسی تاثیر سدیم دودسیل سولفات بر تغییرات ریزسختی پوشش‌های کامپوزیتی نیکل آلومینا و پوشش‌های نیکلی خالص

نوع مقاله : مقاله پژوهشی

نویسندگان
صادق میرزامحمدی
سید محمد جسمانی
عباس عباسیان
گروه مهندسی مواد و متالورژی، دانشگاه ملی مهارت، تهران، ایران
10.22034/ijme.2025.478764.2008
چکیده
ساخت پوشش‌های کامپوزیتی کاربردی به وسیله روش آبکاری الکتریکی نیازمند دستیابی به روش‌های مناسب جهت افزایش ریزسختی آن‌ها ‌می‌باشد. بر این اساس، هدف این تحقیق بررسی و مقایسه تاثیر سدیم دودسیل سولفات (SDS) بر آبکاری کامپوزیتی و خواص ریزسختی پوشش‌های کامپوزیتی نیکل آلومینا و پوشش‌های نیکلی خالص قرار داده شد. جهت آبکاری پوشش‌ها از نمونه‌های فولادی استفاده شد. حمام وات به عنوان الکترولیت وان آبکاری تعیین گردید. از ترکیب سدیم دو دسیل سولفات با غلظت‌های مختلف 50mg/l تا 300mg/l به عنوان افزودنی حمام وات استفاده شد. افزایش غلظت SDS در حمام تا 200mg/l سبب افزایش محتوای ذرات از 8/1 تا 5 درصد وزنی شد. ریزسختی پوشش‌های کامپوزیتی زمینه نیکلی و نیکلی خالص به وسیله یک دستگاه ریزسختی سنج ویکرز ارزیابی شد. تغییر غلظت SDS از 50mg/l تا 150mg/l به دلیل افزایش محتوای ذرات تقویت کننده در پوشش، سبب افزایش ریزسختی از 260Hv تا 510Hv شد. افزایش مقدار غلظت SDS از 150mg/l تا 200mg/l علی رغم افزایش محتوای ذرات تقویت کننده در پوشش، سبب کاهش ریزسختی از 510Hv تا 460Hv شد. بدین ترتیب که افزایش SDS از 150mg/l به 200mg/l باعث کاهش 11 درصدی در ریزسختی پوشش نیکلی خالص شد. زیرا، افزایش بیش از حد این افزودنی سبب ایجاد مواد کربن دار و تردی زمینه نیکلی می شود. بر اساس نتایج به‌دست‌آمده ‌می‌توان نتیجه گرفت، مقدار بهینه غلظت SDS در حمام وات جهت بهبود ریزسختی پوشش‌های کامپوزیتی نیکل آلومینا بین 100mg/l تا 150mg/l ‌می‌باشد.
کلیدواژه‌ها
نیکل
پوشش کامپوزیتی
آبکاری الکتریکی
سدیم دو دسیل سولفات
ریزسختی

عنوان مقاله English

Investigating the effect of sodium dodecyl sulfate on microhardness changes of nickel-alumina composite coatings and pure nickel coatings

نویسندگان English

Sadegh Mirzamohammadi
Seyed Mohammad Jesmani
Abbas Abbasian
Department of Materials and Metallurgical Engineering, National University of Skills (NUS), Tehran, Iran
چکیده English

Fabrication of practical composite coatings by electroplating method requires obtaining suitable methods to increase their micro hardness. Based on this, the aim of this research was to investigate and compare the effect of sodium dodecyl sulfate (SDS) on composite plating and micro hardness properties of nickel-alumina composite coatings and pure nickel coatings. The Watt bath was determined as the electrolyte of the electroplating bath. The combination of Sodium dodecyl sulfate with different concentrations of 50 mg/l to 300 mg/l was used as an additive for the Watt’s bath. Increasing the concentration of SDS in the bath up to 200mg/l caused an increase in the content of particles from 1.8 to 5% by weight. The micro hardness of nickel and pure nickel composite coatings was evaluated by a Vickers micro hardness tester. Changing the concentration of SDS from 50mg/l to 150mg/l due to the increase in the content of reinforcement particles in the coating caused an increase in micro hardness from 260Hv to 510Hv. Increasing the concentration of SDS from 150mg/l to 200mg/l caused a decrease in micro hardness from 510Hv to 460Hv despite the increase in the content of reinforcement particles in the coating. Increasing SDS from 150mg/l to 200mg/l caused an 11% decrease in the micro hardness of the pure nickel coating. Because, excessive increase of this additive causes the formation of carbonaceous materials and embrittlement of the nickel substrate. Based on the obtained results, it can be concluded that the optimal value of SDS concentration in the water bath to improve the micro hardness of nickel-alumina composite coatings is between 100mg/l and 150mg/l.

کلیدواژه‌ها English

Nickel
Composite Coating
Electroplating
Sodium Dodecyl Sulfate
Microhardness
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