Influence of cathode-to-anode area ratio and separation distance on galvanic corrosion currents of steel in concrete containing chlorides

Anticorrosive coatings: a review

“…246 In the case of insufficient addition of anodic inhibitors, an undesirable anode to cathode area will be formed, which increases the rate of corrosion. 247 Insufficient amounts of cathodic inhibitors, as opposed to insufficient amounts of anodic inhibitors, still decrease the rate of corrosion as the active cathodic area is reduced. The inhibitive character and oxygen dependency of various cations are given in Table 7. PHOSPHATES: At present, phosphates containing pigments are the most widely applied type of inhibitive pigments in the European coating industry.…”

Corrosion Resistance of Cr-bearing Rebar to Macrocell Corrosion Caused by Concrete Cover Crack

“…This can be attributed to the corrosion products accumulating on anodic bars, which inhibited the diffusion of iron ions and dissolved oxygen while increasing the electric resistance. [20][21][22] On the other hand, macrocell corrosion current density was measurable only on Cr-bearing rebars with a Cr content of 3 % or less and SD345, with the values being less than 0.2 mA/cm 2 excepting those of SD345 up to 1 month of the accelerated curing process. The macrocell current densities of Cr-bearing rebars with a Cr content of 5 % or more were particularly marginal.…”

Galvanic Corrosion of a Carbon Steel-Stainless Steel Couple in Sulfide Solutions

“…Akid and Mills (Ref 3) introduced a scanning reference electrode technique (SRET) in galvanic corrosion research, and characterized the potential distribution of a galvanic couple. Furthermore, it has been accepted (Ref [4][5][6][7][8][9][10] that the galvanic corrosion behavior is influenced not only by the electrochemical properties of the target metals, but also by various environmental parameters, including solution conductivity and pH, cathode/anode area ratio, distance between the two metals in the couple, temperature, solution flow speed, etc.…”