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The variation of AISI 1045 carbon steel corrosion rate in seawater is investigated under the simultaneous effect of marine parameters in both stagnant and turbulent conditions. The combined effect of salinity, velocity, pH, and temperature is studied using two-by-two graphical curves, while each parameter is applied at three levels. The possible influence of simultaneously acting factors on each considering parameter is experimentally studied and explained using theoretical basis. This paper offers an advantage of considering the simultaneous effect of parameters instead of individual ones, which simulate the experimental media close to the real in-site marine environment where all the affecting factors act in a combined manner. The most innovation of this study is two-by-two investigation of combined action of effective parameters on corrosion rate, which is much more comprehensive and detailed compared to previous researches. Every parameter is considered at three ranges and all the possible interactions with other factors are taken into account. It is proven that the effect of considered parameters on the rate of corrosion is the function of other simultaneously acting factors. The role of fluid velocity condition and also the reaction polarization status is found to be pronounced.

Corrosion rate of carbon steel under synergistic effect of seawater parameters including pH, temperature, and salinity in turbulent condition