ASTM G21-09 rus PDF

Full title and description

St ASTM G21-09 rus — Russian-language edition (or translation) of ASTM G21-09: "Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi." The document describes a laboratory practice for exposing molded and fabricated polymeric specimens to defined fungal inocula, incubating under controlled warm, humid conditions, and visually rating fungal growth and material deterioration.

Abstract

ASTM G21-09 is a short practice (original edition approved in 2009) that provides a standardized procedure to evaluate the susceptibility of synthetic polymeric materials (films, sheets, molded parts, coatings) to fungal colonization and associated changes in optical, mechanical or electrical properties. The method covers specimen selection, inoculation, incubation (warm, high-humidity), observation and a visual rating system intended to give comparative resistance data for materials and additives.

General information

• Status: Superseded / historical (ASTM G21-09 has been replaced by later revisions of ASTM G21; later editions appear as G21-15 and subsequent editorial revisions).
• Publication date: Current edition approved Dec 1, 2009 (published 2010); designation G21−09.
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: Biological deterioration / polymers; typical ICS codes cited with listings include 23.100.60, 73.080 and 83.080.01 (plastics and nonmetallic materials).
• Edition / version: G21-09 (designation indicates 2009 revision).
• Number of pages: Approximately 5 pages (short practice).

Scope

This practice covers determination of the effect of fungi on synthetic polymeric materials in the form of molded and fabricated articles, tubes, rods, sheets, and film materials. It is intended to produce comparative data on surface growth, discoloration, loss of optical transmission, and other property changes under conditions favorable to fungal growth; specific property tests referenced are to be performed by the applicable ASTM methods.

Key topics and requirements

• Specimen selection and preparation for molded, fabricated, sheet and film polymer materials.
• Use of defined fungal inocula and microbiological handling procedures (test portions inoculated with representative fungi).
• Controlled incubation: typically warm (about 28–30 °C) and high relative humidity (≥85%) for prescribed exposure periods.
• Visual examination and a standardized rating scale for fungal coverage and surface deterioration; option to measure changes in optical, mechanical or electrical properties by referenced ASTM test methods.
• Recommendations about reporting the greatest observed deterioration (to avoid over-optimistic averages) and notes about safety/biological handling by trained personnel.

Typical use and users

Manufacturers of plastics, coatings and composite materials; quality and R&D laboratories evaluating mold/mildew resistance of polymer formulations and additives (plasticizers, stabilizers, colorants); flooring, decking and building-product makers who require documented fungal resistance for product claims and specifications. Test results are used for material development, quality control and comparative marketing/performance claims. Commercial product pages and technical data sheets commonly reference ASTM G21-family tests when claiming mold resistance.

Related standards

Standards and practices commonly used alongside or as alternatives to ASTM G21 include ISO 846 (tests for effects of microorganisms on plastics), ASTM G22 (resistance of plastics to bacteria), ASTM G160 (soil burial/microbial susceptibility), and other G03 committee practices covering biological deterioration and weathering of nonmetallic materials. Users should consult the latest ASTM and ISO listings for current versions.

Keywords

ASTM G21-09, fungi resistance, mould/mildew, polymer fungal susceptibility, synthetic polymers, mold test, Russian translation, biological deterioration, incubation, visual rating.

FAQ

Q: What is this standard?

A: It is ASTM G21-09, a standard practice for determining the resistance of synthetic polymeric materials to fungi; the "St ASTM G21-09 rus" label refers to a Russian-language edition or translation of that 2009 practice.

Q: What does it cover?

A: The procedure for inoculating polymer specimens with fungi, incubating under warm, high-humidity conditions, visually rating fungal growth and reporting associated changes in material properties; it is intended for comparative assessments rather than absolute service-life predictions.

Q: Who typically uses it?

A: Material manufacturers, testing laboratories, product developers and quality managers in plastics, coatings, flooring, decking and composite-product industries who need standardized comparative data on fungal resistance.

Q: Is it current or superseded?

A: G21-09 is a 2009 revision of the practice and has been superseded by later editions of ASTM G21 (for example G21-15 and later editorial revisions listed by ASTM). Users should obtain and use the latest ASTM G21 edition for current testing requirements.

Q: Is it part of a series?

A: Yes — it is part of ASTM Committee G03's suite of practices for durability and biological deterioration of nonmetallic materials; related G03 standards address bacterial resistance, soil burial, weathering and reference test methods for mechanical/electrical property measurements.

Q: What are the key keywords?

A: Fungi, mold, mildew, polymer, ASTM G21, fungal resistance testing, incubation, visual rating, Russian translation.