PREPARATION OF PHOSPHATES ,MOLYBDATES AND PHOSPHO- MOLYBDATES AS ECO- FRIENDLY ANTI-CORROSIVE PIGMENTS FROM LOCAL ORES FOR PAINT APPLICATION

IN RESPONSE TO THE ONGOING ELIMINATION OF CHROMATE – AND LEAD – BASED PIGMENTS AND THE NEED TO IDENTIFY EFFECTIVE REPLACEMENTS ,PHOSPHATES AND MOLYBDATES ARE FINDING INCREASED APPLICATION IN COATING INDUSTRY PHOSPHOMOLYBDATES , THE NEWEST OF THE SECOND GENERATION OF MOLYBDATE PIGMENTS , INCORPORATE A SYNERGISTIC COMBINATION OF PHOSPHATE AND MOLYBDATE COMPOUND AND BELIVED TO HAVE EXECPTIONAL CORROSION INLIBITING ACTIVITY , WHICH HAS ALLOWED FOR MORE OPTIMIZED APPLICATIONS IN SPECIFIC TYPES OF COATINGS IN THIS STUDY,PREPARATION OF PHOSPHATE , MOLYBDATE , AND PHOSPHOMOLYBDATE PIGMENTS WAS CARRIED OUT USING LOCAL ORES . CHARACTERIZATION OF THE MENTIONED PIGMENTS WAS PERFORMED VIA SPECTROSEOPIE METHODS OF ANALYSIS BY X-RAY DIFFRACTION (XRD) , AND SEANNING ELECTRON MICROSCOPY (SEM) . IN ADDITION TO THERMAL GRAVIMETRIC ANALYSIS (TGA). THE PIGMENTS WERE ALSO EVALUATED ACCORDING TO INTERNATIONAL STANDARD TESTING METHODS THE OPTIMUM CONDITIONS FOR THE PREPARATION OF THE PIGMENT HAVE BEEN ESTIMATED , AND ALSO THEIR ANTICORROSIVE PROPERTIES WERE DETECTED BY INCORPORATION IN PAINT FORMULATIONS USING MEDIUM OIL ALKYD RESIN AS A BINDER . THE PAINT FILMS WERE TESTED IN ARTIFICIAL SEAWATER FOR 28 DAYS . THE RESULTS SHOWED SUPERIOR ANTICORROSIVE PROTECTION PROPERTIES OF PREPARED PIGMENTS OVER THIER PHOSPHATE AND MOLYBDATE COUNTERPARTS