The objective of this work is to characterize two materials in order to synthesize anticorrosive coating. These materials are an oolitic iron oxide pigment containing phosphorus and scale witch is a by-product of steel making that should be recycled. The characterization of these two components took place in the URASM/CRTI-Annaba laboratories. Chemical analysis showed that the pigment contains 53.18% iron and a siliceous gangue. The scale contains 73.83% iron as iron oxides (FeO, Fe 3 O 4 and Fe 2 O 3).Grinding tests have shown that the scale is much more suitable for grinding than pigment. Particle size analysis gave a volume distribution of particles ranging in size from 0.7 to 32 microns for the scale and from 0.6 to 40 microns for the pigment; their specific surfaces are between 1.6 and 1.5 m 2 /g. TGA and DTA analyzes have shown that the pigment loses weight with phase dissolution by consuming energy as the temperature increases. Scale is gaining weight by forming a new phase with heat. At SEM, the iron pigment is in the form of an aggregate of grains surrounded by gangue. Scale showed a homogeneous structure composed of iron oxide grains of sizes and shapes ranging from 1 to 10 μm. X-ray diffraction analysis showed that the iron contained in the pigment was in the form of hematite and goethite. A tiny portion is combined with silica as Fe 2 SiO 4. Iron in Scale is in the form of three oxides (FeO, Fe 2 O 3 and Fe 3 O 4). Spectrophotometric tests showed that for both materials absorption is nil and reflection is maximal (100%) in the visible range. The different coating formulations used have shown that a mixture of 71.43% pigments and 28.57% scale has the best corrosion resistance, resulting in low current and low corrosion rate.

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Two materials are studied to synthesize a vinyl painting. Iron ore is an iron pigment with an oolithic structure containing phosphorus. The second material is a steel by-product. The raw materials proprieties were studied by chemical, particle size, thermal, XRD and spectrophotometric analysis. The iron contents of the pigment and scale are respectively 53.18% and 73.83%. The grindability of scale is better than that of the pigment. The particle volume distribution is 0.7 to 32 µm for scale and 0.6 to 40 µm for pigment. TGA and DTA tests show that the pigment loses weight with phase dissolution by consuming energy and the scale gains weight with the formation of a new phase when the temperature increases. The SEM of the scale showed a homogeneous structure of iron oxide grains ranging from 1 to 10 μm. XRD analysis shows that the iron in the pigment is in the form of (Fe 2 O 3) and FeO (OH)) and very little (Fe 2 SiO 4). The iron in the scale is in the form of (FeO, Fe 2 O 3 and Fe 3 O 4). Spectrophotometric tests show that the two materials have no absorption and their reflection is maximum (100%) in the visible range.