- Acid (Total), Hydrogen fluoride [HF], + Nitric acid[HNO3]

- Hydrochloric acid [HCl] in Pickling solution

- Hydrochloric acid [HCl] + Iron [Fe] in Pickling solution

- Hydrogen Peroxide [H2O2] in Pickling solution

- Iron [Fe3+], Sulfuric acid [H2SO4], + Hydrogen fluoride[HF] in Pickling bath

- Aluminum [Al3+] + Caustic [NaOH]

- Fluoride [F-] in 2.5% Sulfuric acid [H2SO4] bath

- Fluoride [F-] + Free and Total acid in etching bath

- Sulfuric acid [H2SO4] + Aluminum [Al3+] in Aluminumetching bath