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  • ASTM
    D4610-98(2013) Standard Guide for Determining the Presence of and Removing Microbial (Fungal or Algal) Growth on Paint and Related Coatings
    Edition: 2013
    $91.10
    Unlimited Users per year

Description of ASTM-D4610 2013

ASTM D4610 - 98(2013)

Standard Guide for Determining the Presence of and Removing Microbial (Fungal or Algal) Growth on Paint and Related Coatings

Active Standard ASTM D4610 | Developed by Subcommittee: D01.28

Book of Standards Volume: 06.01




ASTM D4610

Significance and Use

3.1 Microbial growth is a major cause of discoloration and deterioration of paint films. This guide describes techniques used to distinguish fungi and algae from other surface contaminants.

3.2 Repainting a surface contaminated with fungi or algae generally causes more rapid infestation of the new paint than repainting a surface from which fungal or algal growth has been removed. In addition, poor adhesion, staining/bleeding, and many other problems may result. This guide describes methods for removing fungal or algal growth prior to repainting.

Note 1 It is extremely important that all steps and notes be read and followed. In particular the washing steps outlined in 5.2.2 and 5.2.4 must be fully carried out, since residual sodium hypochlorite (bleach) can cause many of the same problems, or even loss of coloration after repainting, and residual phosphate detergents can encourage further fungal and algal growth.
Note 2 This procedure is intended for use when recoating the surface. Reports of using this procedure to remove fungi and algae without recoating necessitate inclusion of a warning about the adverse effects of bleach on a coating film. The oxidative effects of bleach can degrade film properties, including particularly the bleaching (loss of color) in films containing organic coloring pigments (such as quinacridones, etc.), loss of gloss, chalking, etc. A small patch must be tested prior to use of this procedure for that purpose.

1. Scope

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

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D2022 Test Methods of Sampling and Chemical Analysis of Chlorine-Containing Bleaches

D3274 Test Method for Evaluating Degree of Surface Disfigurement of Paint Films by Fungal or Algal Growth, or Soil and Dirt Accumulation


Keywords

algals; bleaches; fungals; microbials; washes;


ICS Code

ICS Number Code 87.040 (Paints and varnishes)


DOI: 10.1520/D4610

ASTM International is a member of CrossRef.

ASTM D4610

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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