M. Delucchi , A. Barbucci and G. Cerisola
Crack-bridging ability of organic coatings for concrete: influence of the method of concrete cracking, thickness and nature of the coating
Progress in Organic Coatings 49 (2004) 336-341

ABSTRACT
Some concern about the determination of a standardised test for crack-bridging ability (CBA) measurements exists. The present work focuses on the analysis of the results of experimental tests performed to simulate the mechanical behaviour of a coating when a crack in the beneath concrete opens and grows. The influence of the method of concrete cracking, thickness and nature of the coating on the CBA are studied. Experimental results suggest that: (i) the same coating has higher CBA when the crack in the beneath concrete is produced through slight bending rather than through tensile loading; (ii) the CBA clearly depends on the nature (then mechanical properties) of the applied coating; (iii) power law relationships between CBA and thickness of the coating exist.

M. Panizza and G. Cerisola
Influence of anode material on the electrochemical oxidation of 2-naphthol: Part 2. Bulk electrolysis experiments
Electrochimica Acta 49 (2004) 3221-3226

ABSTRACT
The electrochemical oxidation of 2-naphthol has been studied by galvanostatic electrolysis, using a range of electrode materials such as lead dioxide, boron-doped diamond (BDD) and Ti–Ru–Sn ternary oxide anodes. The influence of some operating parameters, such as current density, flow-rate and chloride concentration on naphthol oxidation has been investigated in order to find the optimum experimental conditions. Measurements of chemical oxygen demand, HPLC and total organic carbon have been used to follow the oxidation. The experimental data indicate that on PbO₂ and BDD, naphthol oxidation takes place by reaction with electrogenerated hydroxyl radicals and is favoured by low current density and high flow-rate. On the contrary, on a Ti–Ru–Sn ternary oxide the mineralisation of naphthol occurs only in the presence of chloride ions that act as redox mediators and COD removal is affected by chloride concentration and is not significantly influenced by the current density and mass-transfer coefficient. From a comparison of the results of the three electrodes it has been found that boron-doped diamond gives a faster oxidation rate and better current efficiency.