An Ecofriendly Initiative for the Corrosion Inhibition of Mild Steel in 1 M HCl Using Tecoma capensis Flower Extract

Table 6

Preliminary phytochemical screening of the crude extract.

Plant	Phytochemical constituents
	Flavonoids	Alkaloids	Terpenoids	Saponins	Tannins	Reducing; sugar	Polyphenols	Anthraquinones
TCF	+++	−	++	+	−	+	+	−

+++: appreciable amount; ++: moderate amount; +: trace amount; and −: not detected.