The variations in corrosion rate and percentage inhibition efficiency (%IE) with immersion time at different concentrations of ferrous gluconate for 28 days of exposure are shown in Figures 2 and 3.
In the presence of 0.5 g/mL concentration of ferrous gluconate, the corrosion rate value was 0.051 mm/yr after 28 days of exposure time compared to the absence of ferrous gluconate which gave 0.110 mm/yr after 28 days of exposure time.
Therefore, the adsorption of ferrous gluconate onto the surface of the aluminum alloy at all concentration studied prevents the breakdown of the film leading to higher corrosion resistance of the aluminum alloy.
The presence of ferrous gluconate significantly changes both anodic and cathodic region when compared to the absence of inhibitor .
The decrease in corrosion rate and corrosion current density ([i.sub.corr]) in the presence of all the different concentrations of ferrous gluconate studied proved that ferrous gluconate act as an effective corrosion inhibitor for aluminum alloy in saline environment at 28[degrees]C.
Mineral Products: Calcium, copper, ferrous, magnesium, manganese and zinc in forms of citrates, gluconates, lactates, malates, phosphates, fumerates, sulfates, nitrates
Mineral Products: chelates, organically bound yeasts, gluconates
Mineral Products: Boron amino acid chelates, calcium amino acid chelates, calcium chloride, calcium lactate, calcium citrus soluble chelates, chromium amino acid chelates, chromium polynicontinate, copper amino acid chelates, iron amino acid chelates, iron fumerate, magnesium amino acid chelates, magnesium citrate, magnesium oxide, manganese amino acid chelates, potassium chloride, potassium sulfate, selenium triturate, zinc amino acid chelates, zinc chloride, zinc gluconate, zinc oxide, zinc picolinate
Mineral Products: Calcium carbonate (powder & granular), calcium citrate, calcium lactate, calcium gluconate, calcium citrate (powder & granular), calcium phosphate, mineral chelates, chromium polynicotinate, ferrous fumarate, ferrous sulfate, InstaCal[TM] (water-soluble calcium), magnesium citrate (powder & granular), magnesium lactate, magnesium oxide powder, magnesium oxide granular (Mag-Gran[TM]), magnesium phosphate, magnesium stearate, magnesium sulfate anhydrous, manganese sulfate monohydrate, oyster shell calcium, potassium citrate, potassium phosphate, zinc citrate, zinc gluconate, zinc oxide