請問幾句英文! 關於ISO 9211 鍍膜~
The PH shall be measured either electrometrically by means of a glass electrode, or colourmetrically using bromothymol blue as an indicator.
The salt water solution shall be prepared by dissolving sodium chloride in distilled or deionized water at room temperature to obtain a concentration of 45 g/l. The sodium chloride shall not contain more than 1% impurities in total.
The purpose of these tests is to evaluate to what extent the optical and mechanical properties of optical coatings on components and substrates are affected when subjected to specific abrading conditions at ambient atmospheric conditions.