YAPAY DEN�Z SUYUNDA FARKLI HIZLARDA Cu-%10 Ni ALA�IMININ EROZYON-KOROZYON DAVRANI�I

GAVGALI, Mehmet; TOT�K, Ya�ar; NEV�LE, Anne

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YAPAY DEN�Z SUYUNDA FARKLI HIZLARDA Cu-%10 Ni ALA�IMININ EROZYON-KOROZYON DAVRANI�I [Pamukkale Univ Muh Bilim Derg]

Pamukkale Univ Muh Bilim Derg. 2002; 8(2): 155-160

YAPAY DEN�Z SUYUNDA FARKLI HIZLARDA Cu-%10 Ni ALA�IMININ EROZYON-KOROZYON DAVRANI�I

Mehmet GAVGALI¹, Ya�ar TOT�K¹, Anne NEV�LE²
¹Atat�rk �niversitesi, M�hendislik Fak�ltesi, Makine M�hendisli�i B�l�m�, 25240 Erzurum, T�rkiye
²Heriot-Watt University, Engineering Faculty, Mechanical and Chemical Department, Edinburgh, UK

Bu �al��mada yapay deniz suyunda Cu-10 % Ni bak�r-nikel ala��m�n�n erozyon-korozyon davran�� incelenmi�tir. Erozyon-korozyon testleri farkl� h�zlarda d�nen silindirik elektrot kullan�larak ger�ekle�tirilmi�tir. Denemelerde serbest korozyon potansiyeli, anodik polarizasyon, elektrokimyasal impedans analizi, a��rl�k kayb� testleri ve optik mikroskop incelemesi yap�lm��t�r. D�nme h�z� ve zaman�n artmas� ile yapay deniz suyundaki Cu-10 % Ni ala��m�n�n korozyon h�z� artm��t�r. Koruyucu y�zey filmindeki hasar�n, d�nme h�z� 1600 d/d oldu�unda 3. saatten itibaren, 2000 d/d oldu�unda ise 1. saatten itibaren ba�lad�� ve giderek artt�� belirlenmi�tir.

Anahtar Kelimeler: Yapay deniz suyu, Erozyon-korozyon, Bak�r-nikel ala��m�, D�nme h�z�

EROSION-CORROSION BEHAVIOUR OF Cu-10 % Ni ALLOYS AT DIFFERENT ROTATION SPEEDS IN ARTIFICIAL SEA WATER

In this study, the erosion-corrosion behaviour of Cu-10 % Ni copper-nickel alloy in artificial sea water has been investigated. The erosion-corrosion tests have been conducted using a cylindrical electrot rotating at different speeds. In the experiments, free corrosion potential tests, cycle polarization tests, electrochemical impedance spectrum (EIS) analysis, weight loss tests, and optic microscope observation were performed. The corrosion rate of Cu-10 % Ni copper-nickel alloy in artificial sea water increased with increasing rotation speed and time. It was also determined that the breakdown of the protective film began after 3 hours at the rotation speed of 1600 rpm, and 1 hour at the 2000 rpm, and grew with increasing time.

Keywords: Artificial sea water, Erosion-corrosion, Copper-nickel alloys, Rotation speed

Mehmet GAVGALI, Ya�ar TOT�K, Anne NEV�LE. EROSION-CORROSION BEHAVIOUR OF Cu-10 % Ni ALLOYS AT DIFFERENT ROTATION SPEEDS IN ARTIFICIAL SEA WATER. Pamukkale Univ Muh Bilim Derg. 2002; 8(2): 155-160
Makale Dili: T�rk�e

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