Download or read book GB T 20042 3 2022 Translated English of Chinese Standard GBT20042 3 2022 written by https://www.chinesestandard.net and published by www.ChineseStandard.net. This book was released on 2022-06-04 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes the thickness uniformity test, proton conductivity test, equivalent weight test, air permeability test, tensile property test, swelling rate test, and water uptake test for proton exchange membranes used in proton exchange membrane fuel cells. This document applies to all types of proton exchange membranes.