ZN GUARD Rust Inhibitor: Rust Inhibitor for Galvanized Steel - Guardian Chemicals

ZN GUARD Rust Inhibitor: Cleaning Galvanized Steel

ZN GUARD is a highly effective corrosion inhibitor designed for the reduction of acid attack on zinc and galvanized metal surfaces. It will also help protect mild steel, copper, brass and stainless steel. ZN GUARD has been specially formulated for inhibiting citric and sulphamic acid cleaning solutions, but will also reduce the rate of acid attack by hydrochloric and sulphuric acid solutions.


ZN GUARD has been shown to reduce corrosion of G70 Hot Dipped Galvanized by up to 94%1 and 1008 Cold Rolled Steel by up to 80%2 during acid cleaning with citric or sulphamic acid solutions.



  • Reduce corrosion of zinc and galvanized metal when performing acid cleaning processes.
  • Concentrated for cost effective dilution.
  • Product is effective at elevated temperatures up to a maximum of 49°C at a concentration of 0.5%.