Corrosion products should be removed from magnesium alloys by the use of • a solution of 10% by weight of chromic acid in distilled water with 0.1% by volume of sulphuric acid. • a solution of 10% by volume of chromic acid in distilled water with 1% phosphoric acid. • aluminium wool.
azfar92 asking: • I came across with this exact same question from other question bank. However, the answer was by using 0.1% of sulphuric acid instead of 1% phosphoric acid.Just want to confirm which answer is true. Sulphuric acid or phosphoric acid.