International Gold Number (IGN)
The International Gold Number (IGN) is a measure of the ability of a substance to protect gold from tarnishing. It is determined by the amount of the substance that is required to prevent the tarnishing of a specific surface area of gold. The higher the IGN, the more effective the substance is at preventing tarnishing.
IGN is a valuable metric for evaluating the effectiveness of corrosion inhibitors and protective coatings for gold. It is used in a variety of industries, including jewelry, electronics, and automotive manufacturing.
Method for Determining IGN
The IGN is determined by a standardized test method. The test method involves exposing a gold surface to a corrosive environment in the presence of varying concentrations of the test substance. The concentration of the test substance that is required to prevent tarnishing is the IGN.
Factors that Affect IGN
The IGN of a substance can be affected by a variety of factors, including:
* pH: The pH of the corrosive environment can affect the IGN. In general, higher pH levels result in lower IGNs.
* Temperature: The temperature of the corrosive environment can also affect the IGN. In general, higher temperatures result in lower IGNs.
* Concentration of the test substance: The concentration of the test substance in the corrosive environment can affect the IGN. In general, higher concentrations of the test substance result in higher IGNs.
Applications of IGN
IGN is used in a variety of applications, including:
* Corrosion inhibition: IGN is used to evaluate the effectiveness of corrosion inhibitors for gold. Corrosion inhibitors are substances that are added to a corrosive environment to prevent or reduce the corrosion of metal surfaces.
* Protective coatings: IGN is used to evaluate the effectiveness of protective coatings for gold. Protective coatings are applied to gold surfaces to prevent or reduce tarnishing.
* Quality control: IGN is used to ensure the quality of gold products. Gold products that have a high IGN are less likely to tarnish and are therefore more valuable.
Conclusion
IGN is a valuable metric for evaluating the effectiveness of corrosion inhibitors and protective coatings for gold. It is used in a variety of industries to ensure the quality of gold products.
原创文章，作者：Kevin，如若转载，请注明出处：https://fangeou.com/2253.html
