Iron Sulfide Scale Neutral Cleaning Agent Remove Ferrous Sulfide Scale Oilfield Scale Chemical Removal The HM-200 ferrous / Iron sulfide scale neutral complexing cleaning agent does not contain inorganic acid, organic acid or hydrogen ions (H + ), neither produces hydrogen sulfide gas throughout the cleaning process During cleaning ferrous sulfide,the complexing ability of Fe2+,Fe3+,s2�·,Ca2+,Mg2+ reaches between 20000-30000 ppm.The agent neither corrode the metal substrate of the equipment,nor cause hydrogen sulfide solution to generate corrosion to the equipment.Furthen nore,using our product can prevent the ferrous sulfide residue causing explosion when contacting air,as well as hydrogen sulfide gas poisoning accident.