意义及用途

3.1 微生物生长是漆膜变色、变质的主要原因. This guide describes the techniques used to distinguish fungi and algae from other surface contaminants.

3.2 Recoating a surface contaminated with fungus or algae usually results in a more rapid infestation of the new paint than repainting a surface that has been removed from fungal or algal growth. 此外, poor adhesion, staining/bleeding, and many other problems may result. This guide describes ways to remove fungal or algal growth before repainting.

笔记 1: It is important to read and follow all steps and notes. 尤其, the washing steps outlined in 5.2.2 和 5.2.4 need to be carried out completely, as residual sodium hypochlorite (bleach) can cause many of the same problems, or even lose coloring after repainting, and residual phosphate detergents can further promote fungal and algal growth.

笔记 2: This procedure is suitable for recoating surfaces. Reports of using this procedure to remove fungi and algae without recoating need to include a warning about the adverse effects of bleach on the coating. The oxidation of bleach will reduce the performance of the film, especially the “bleaching” (color loss) in the film containing organic pigments (such as quinacridone, ETC。), the reduction of gloss, 粉末, ETC. Small patches need to be tested before using this program for this purpose.

ASTM D4610-1998 测定微生物生长和去除的标准指南 (真菌或藻类) 关于油漆和相关涂料

步 1: 范围

1.1 This guide describes techniques for determining the presence of fungal or algal growth on paints and related coatings, and methods for removing such growth prior to recoating.

1.2 以 SI 单位表示的值应被视为标准值. 括号内的数值仅供参考.

1.3 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全机制, 健康和环境实践，并在使用前确定监管限制的适用性.

1.4 该国际标准基于国际公认的标准化原则 “关于国际标准制定原则的决定, 指南和建议” 由技术性贸易壁垒委员会发布 (技术性贸易壁垒) 世界贸易组织.