Keywords
Abstract
Ushbu maqolada paxta tozalash va tola ajratish mashinalarining ishchi qismlarida yuzaga keladigan mexanik yeyilish muammosi hamda ularning xizmat muddatini oshirishda elektrokimyoviy sirt himoyalash texnologiyasidan foydalanish imkoniyatlari tadqiq etiladi. Paxtani dastlabki qayta ishlash jarayonida arrali disklar, kolosniklar, ishchi barabanlar, qirg‘ichlar, pichoqlar, valiklar va boshqa metall detallar paxta tarkibidagi chang, mineral aralashmalar, qum va boshqa abraziv zarrachalar bilan uzluksiz kontaktda bo‘ladi. Natijada ishchi yuzalarda abraziv, adgezion va charchash yeyilishi rivojlanib, detallarning geometrik aniqligi va texnologik jarayonning barqarorligi pasayadi. Tadqiqotda po‘lat asosli ishchi qismlarning sirtiga nikel, nikel-kobalt, xrom hamda metall-keramika kompozit qoplamalarini elektrokimyoviy usulda hosil qilish imkoniyatlari tahlil qilindi. Elektrolit tarkibi, tok zichligi, pH, harorat, elektroliz davomiyligi va qoplama qalinligining sirt mikrostrukturasi, qattiqligi, adgeziyasi va yeyilish tezligiga ta’siri asosiy parametrlar sifatida belgilandi. Elektrokimyoviy qoplamalarni qo‘llash orqali ishchi qismlarning sirt qattiqligi va yeyilishga chidamliligini oshirish, ishqalanish koeffitsiyentini kamaytirish hamda detallarni qayta tiklash davriyligini uzaytirish imkoniyati asoslab berildi.
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