Evaluación de un desoxidante fosfatado como tratamiento de remoción de óxido para la empresa Cami Ingeniería de Procesos

Abstract

The aim of this study was to evaluate a phosphate deoxidizer for the company CAMI Process Engineering, capable of removing rust from corroded steel surfaces, for which two types of deoxidizer formulations were made applying the method of mixing components that were an oxoacid acid, mineral acid, non-polar surfactant and distilled water, where the best formulation consists of 50% oxoacid acid, which is responsible for converting the oxide into salts to remove rust from the metal. Regarding the physical, chemical and rheological tests, the NTE INEN 1009, 820 and Stokes method were applied specifically, obtaining average density data of 1.3158 g / ml, 0.61 for pH and 0.0444 Pa.s in viscosity. To validate the efficiency of the deoxidizer, this product was applied to standardized corroded specimens of black and mild steel, by means of immersion and spraying treatments, so that for immersion there was a treatment time of approximately 1 hour and for spraying around 3 hours. The oxide removal of the specimens was evaluated by applying the Bresle tests according to the NTE INEN-ISO 8502-12 standard, by means of a titration the surface density of water-soluble iron ions was analyzed, the same that indicate the corrosion present on the metallic surface. This test was carried out before and after the treatments, obtaining an average ion density of 234 mg / m2 for black steel and 103.5 mg / m2 for mild steel after the application of the deoxidizer. In percentage, the corrosion of the specimens was reduced from 87% to 95%. Therefore, it is concluded that the deoxidizer of formulation F1 is capable of removing oxide from metallic steel surfaces, its properties are within the commercially required standards. It is recommended to handle this type of product with caution due to its components.