Optimum Effect of Factors Influencing on Sacrificial Cathodic Protection for Steel Wall

Abstract

The Box-Behnken Design (BBD) is used to model the sacrificial Cathodic Protection System (SCPS) to find the factors effectiveness behaviour. For protection potential assessment the BBD receives (resistivity of environment, sacrificial anode alloy, distance between anode and cathode and surface area for the structure to be protected) as input and gives the protection potential as output. By applying BBD with their analysis tools we get many results. The important results which are the factors individual effectiveness on the sacrificial cathodic protection (SCP) process are the resistivity which has the greatest effect on the potential protection (rank=1) followed by sacrificial anode alloy type (rank=2), surface area for structure protected required (rank=3) and distance between anode and cathode (rank=4). The interaction of sacrificial anode alloy and cathode area (χ 2 χ 4 ) has significant effect on CP process with the limits which are used in this work while the other factors interaction (χ 1 χ 2 , χ 1 χ 3 , χ 1 χ 4 ,χ 2 χ 3 , χ 3 χ 4 ) has insignificant effect on the limits which used in this work.

Cathodic Protection for Steel Pipeline Using Solar Energy

“…When impressed current is taken from electric sources, corrosion rate is calculated by mixed potential theory, while corrosion rate of impressed current taken from solar energy is calculated by the weight loss method. The efficiency of cathodic protection depending on the soil resistivity in the present work reached to the 92.3-94.5, as shown in Table (3).…”

“…The applied current depends on the corrosion current values, which is calculated by polarization method to get the corrosion current and impressed cathodic protection (I corr ,I cp ) respectively as shown in Figure (2). According to galvanokinetic technique, the current of DC solar cell panel, charge regulator (current controller), the current supply and constant controlled by resistance of the circuit are changed until obtaining the value of (I cp ), as shown in Figure (3).…”

“…There are two types of cathodic protection: Sacrificial Anode Cathodic Protection Technique (SACPT), also known as galvanic cathodic protection technique and Impressed Current Cathodic Protection Technique (ICCPT) [2,3]. ICCPT is commonly used on many types of structures such as steel pipelines, underground storage tanks and ship hulls [4].…”

Optimum Effect of Factors Influencing on Sacrificial Cathodic Protection for Steel Wall

“…The experimental work includes the anode and cathode electrode preparation for the laboratory, sacrificial cathodic protection and potentiostate tests and include the solution preparation. The details of experimental setup are explained in [4].…”

“…On the contrary, effects of factors which are far away from the center line represent real effect or significant effect. As per the normal probability plot as shown in Figure (4), points (χ 2 χ 4 , χ 2 χ 3 , χ 1 χ 3 , χ 1 χ 2 ) which are close to a line fitted to the middle group of points represent estimated factors which do not demonstrate any significant effect on the response variable, on the other hand, the points (χ 1 , χ 2 , χ 3, , χ 4, χ 3 χ 4 , χ 1 χ 4 ) appear to be far away from the straight line are likely to represent the real factor effects on the potential protected [10].…”