Corrosion and scale inhibitors are chemicals used to prevent metal corrosion and scale deposition. In China, the national standard for corrosion and scale inhibitors is GB/T 20476-2006 “Corrosion and Scale Inhibitors for Boiler Water Treatment Agents”. This standard specifies in detail the technical requirements, test methods, inspection rules and markings, packaging, transportation, storage, and other contents of corrosion and scale inhibitors.
According to this standard, corrosion and scale inhibitors should meet the following main technical requirements:
Main components: The standard limits the composition of corrosion and scale inhibitors, including the content range of corrosion and scale inhibitors. Different types of corrosion and scale inhibitors can choose different combinations of components.
Corrosion inhibition performance: The standard specifies the corrosion inhibition rate requirements of corrosion and scale inhibitors under different conditions to ensure that they can effectively slow down metal corrosion.
Scale inhibition performance: The standard requires the scale inhibition effect of corrosion and scale inhibitors, including the ability to inhibit scale deposition and prevent crystal scale blockage.
Solubility: Corrosion and scale inhibitors should be able to quickly dissolve in water for uniform dispersion during water treatment.
Environmental friendliness: The standard limits the environmental impact of corrosion and scale inhibitors, including heavy metal content, organic residue, etc.
In addition to GB/T 20476-2006, “Corrosion and Scale Inhibitors for Boiler Water Treatment”, corrosion and scale inhibitors may also be applicable to other specific fields, such as cooling water treatment. There may also be other relevant industry standards or internal standards for different fields.
It is recommended to carefully review relevant standards in specific applications based on the type and target field of corrosion and scale inhibitors required to ensure that the selected and used products comply with corresponding regulations and requirements.