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。
GB/T 22237 规定了液体尤其是表面活性剂溶液表面张力的测定方法。 GB/T 22237 适用于液体静态表面张力的测定,如无机或有机的液体和溶液。 GB/T 22237 等同采用BS EN 14370:2004《表面活性剂—表面张力的测定》(英文版)。
SH/T 1156 规定了白金环法和白金板法测定合成橡胶胶乳表面张力的方法。 SH/T 1156 适用于黏度小于200mPa•s的合成橡胶胶乳。