1. This testmethod measures the contact angle of a test liquid in contact with a flatspecimen of a film or a paper substrate under specified test conditions. Thistest method may be used with any liquid of interest which is compatible withthe equipment use

1. This test methodcovers measurement of the contact angle of water droplets on corona-treatedpolymer film surfaces. NOTE 1—There is no similar or equivalent ISO standard.2. The values statedin SI units are to be regarded as the standard. The values given

This standard is issued under the fixed designation D7334; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last r

This standard is issued under the fixed designation D7490; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last r

1. This guide presents some generally acceptedlaboratory methodologies that are used for determining the corrosivity of crudeoil.2. This guide does not cover detailed calculations andmethods, but rather a range of approaches that have found application in

1. In this method (1-3), the contact anglebetween air and liquid on a paper surface is taken as a measure ofthe resistance of thepaper surface to wetting by the liquid.2. The initial angleof contact or initial wettability is considered to be a measure of

This International Standard specifies a ring method for the determination of the surface tension of polymer dispersions and rubber latices (natural and synthetic). The method is valid for polymer dispersions and rubber latices with a viscosity less than 2

GB/T 6541 适用于非平衡条件下矿物油对水的界面张力的测定，实践证明，用本方法能可靠地指出亲水化合物的存在。 GB/T 6541是等效采用国际标准ISO 6205-1983《石油产品油对水界面张力测定方法（圆环法）》制定的。

GB/T 11276 规定了表面活性剂 临界胶束浓度的测定。 GB/T 11276 反离子活度测量法适用于阳离子表面活性剂 临界胶束浓度的测定；圆环测定表面张力法适用于阴离子和非离子表面活性剂 临界胶束浓度的测定。

GB/T 18396 规定了用环法测定胶乳表面张力的方法。 GB/T 18396 适用于黏度小于200mPa•s的胶乳。为此，应将胶乳用水稀释，使其总固体含量（质量分数）为40%。如有必要，总固体含量应进一步减少，以确保其黏度在规定值之内。 GB/T 18396 也适用于预硫化胶乳和配方胶乳。