EN 12501-2:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Korrosionsschutz metallischer Werkstoffe - Korrosionswahrscheinlichkeit in Böden - Teil 2: Niedrig- und unlegierte EisenwerkstoffeProtection des matériaux métalliques contre la corrosion - Risque de corrosion dans les sols - Partie 2 : Matériaux ferreux faiblement ou non alliésProtection of metallic materials against corrosion - Corrosion likelihood in soil - Part 2: Low alloyed and non alloyed ferrous materials77.060Korozija kovinCorrosion of metalsICS:Ta slovenski standard je istoveten z:EN 12501-2:2003SIST EN 12501-2:2003en01-december-2003SIST EN 12501-2:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12501-2April 2003ICS 77.060English versionProtection of metallic materials against corrosion - Corrosionlikelihood in soil - Part 2: Low alloyed and non alloyed ferrousmaterialsProtection des matériaux métalliques contre la corrosion -Risque de corrosion dans les sols - Partie 2: Matériauxferreux peu ou non alliésKorrosionsschutz metallischer Werkstoffe -Korrosionswahrscheinlichkeit in Böden - Teil 2: Niedrig- undunlegierte EisenwerkstoffeThis European Standard was approved by CEN on 21 February 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12501-2:2003 ESIST EN 12501-2:2003

Procedure for assessing the corrosion load in soil in the case of a newstructure.9Annex B (informative)
General principles of soil studies.10SIST EN 12501-2:2003

soil is sand or gravel,¾
resistivity values are above 100 Wm, for site survey conditions representative of the average soilmoisture content and temperature values,¾
soil conditions as given in Table 1 are absent.In addition, in case of a possible electrical influence, whatever its origin, measurements should be taken on site inorder to assess more precisely its effects on the estimation of the corrosion load. If no measurement is performedthe corrosion load is accepted high.4.2.4 Soil samplingSoil samples are taken at various locations on site taking into account the nature, the heterogeneity and thewetness of the soil; the resistivity and pH values of the soil samples are then measured in the laboratory.Annex B gives additional information on the procedure and measurement methods used for soil sampling.The minimum resistivity value r* and the pH value measured on a soil sample after addition of deionized waterallow to assess the corrosion load using Table 2; the evaluation of soils on the border between two fields ofcorrosion load requires expert knowledge.In addition, a medium corrosion load should be changed to high when heterogeneous soil conditions occur at thelevel of the structure, such as:¾ presence of a water table (partly submerged structure);¾ wide range of r* values of samples (r*max / r*min > 3);¾ wide range of pH values of samples (pHmax - pHmin > 1,5).Table 2 — Corrosion load (free corrosion without concentration cell)> 9,56 – 9,5HIGHMEDIUMLOWpH4,5 - 6< 4,5103050100r* = Minimum resistivity value after adding deionized water (Wm)SIST EN 12501-2:2003
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