Multiple choice

Which of the following acts as a corrosion inhibitor to prevent electrochemical corrosion at the joints of dissimilar metals?

  1. Barium chromate

  2. Barium ferrate

  3. Barium nitrate

  4. Barium oxalate

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Barium chromate is a fine light yellow powder with the formula BaCrO4. It is an oxidizing agent, and produces a green flame when heated, the result of barium ions. It is used as a corrosion inhibitor to prevent electrochemical corrosion at the joints of dissimilar metals.