Author : Amr Ahmed Abd El-Fatah Mohamed
El-Sayed
Degree : M.Sc.
Chemical
Title:
Corrosion Inhibition
Steel in Chloride and Sulfate Solutions
Abstract
This work studies the design of a new
corrosion inhibitor mixture for carbon steel in aggressive environment
containing chloride and sulfate ions and delivers a corrosion inhibition of
99.33. The use of molybdate -nitrite corrosion inhibitor with the addition of
low amount of dichromate gave good inhibition for carbon steel in solutions
containing up to 1000,2000 ppm (wt) of Nael and ~)2S04 respectively. The
inhibition effect of molybdate-nitrite corrosion inhibitor was improved by
increasing the stability of the protective layer formed over the steel surface
as chromate and dichromate ions give more effective passive layers. The
Egyptian environmental law N4 yearl994 accepts the chromate hexavalent ion
concentration up to Ippm (wt) in industrial waste water. the required
dichromate ion concentration meets the Egyptian environmental law constraints.
This work studies the corrosion in chloride sulfate systems at pH=5 and the
effect of the three components corrosion inhibitor on reducing the corrosion
rate. It also shows the effect of environmental parameters on the inhibition effect.
ليست هناك تعليقات:
إرسال تعليق