ASTM D4610-1998 Standard Guide for Determining the Growth and Removal of Microorganisms (Fungi or Algae) on Paints and Related Coatings

Значење и употреба

3.1 Microbial growth is the main cause of paint film discoloration and deterioration. 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. Додатно, poor adhesion, staining/bleeding, and many other problems may result. This guide describes ways to remove fungal or algal growth before repainting.

Белешка 1: It is important to read and follow all steps and notes. Нарочито, the washing steps outlined in 5.2.2 и 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.

Белешка 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 thebleaching” (color loss) in the film containing organic pigments (such as quinacridone, итд.), the reduction of gloss, прах, итд. Small patches need to be tested before using this program for this purpose.

ASTM D4610-1998 Standard Guide for Determining the Growth and Removal of Microorganisms (Fungi or Algae) on Paints and Related Coatings

Корак 1: Обим

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 Вредности изражене у СИ јединицама сматрају се стандардним. Вредности дате у заградама су само за референцу.

1.3 Овај стандард није намењен да реши све безбедносне проблеме, ако их има, повезана са његовом употребом. Одговорност корисника овог стандарда је да успоставе одговарајућу безбедност, здравствене и еколошке праксе и да се утврди применљивост регулаторних ограничења пре употребе.

1.4 Овај међународни стандард је заснован на међународно признатим принципима стандардизације утврђеним у “Одлука о принципима за развој међународних стандарда, Смернице и препоруке” издао Комитет за техничке баријере у трговини (ТБТ) Светске трговинске организације.

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