The oxides on the metal surface, the scale, have not been cleaned properly
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When the oxides and scale on metal surfaces are not properly removed, surfactants with strong chelating properties should be used. Organic amine esters such as TPP have excellent chelating capabilities; they can form stable complexes with various metal ions such as iron, copper, and zinc, which helps to remove oxides, scale, and other contaminants from the metal surface and improves the cleaning effect. It also possesses excellent descaling capabilities, with outstanding abilities to remove dust, carbon deposits, and scale; it can effectively eliminate oil stains, scale, and black carbon/sulfur black stains from the metal surface, thereby restoring its smoothness and luster!
Yes, when oxides and scale on metal surfaces are difficult to remove completely, surfactants with good chelating properties can be used. As you mentioned, the organic amine ester TPP (triphenyl phosphate) possesses excellent chelating capabilities; it can form stable complexes with various metal ions such as iron, copper, and zinc, thereby effectively dispersing and removing oxides, scale, water stains, as well as oil and carbon deposits from metal surfaces. It also possesses good surface wetting, penetration, and emulsification properties, which help to improve the overall cleaning effect and restore and maintain the smoothness and luster of the metal surface. .