panimula
ISO (International Organization para sa Standardisasyon) ay isang pandaigdigang pederasyon ng mga pambansang pamantayan ng katawan (Mga katawan ng miyembro ng ISO). Ang pagbuo ng mga internasyonal na pamantayan ay karaniwang isinasagawa sa pamamagitan ng ISO teknikal na komite. Ang bawat grupo ng miyembro na interesado sa isang paksa kung saan ang isang teknikal na komite ay itinatag ay may karapatang kumatawan sa Komite. Mga internasyonal na organisasyon, ang mga pamahalaan at mga non government organization na nakikipag ugnayan sa ISO ay kasangkot din sa gawaing ito. ISO ay gumagana nang malapit sa International Electrotechnical Commission (IEC) sa lahat ng bagay ng electrical standardization.

Bahagi 1 ng ISO / IEC Directive ay naglalarawan ng mga pamamaraan na ginamit upang bumuo ng dokumentong ito at para sa karagdagang pagpapanatili. Sa partikular na, pansin ay dapat bayaran sa iba't ibang mga pamantayan sa pag apruba na kinakailangan para sa iba't ibang uri ng mga dokumento ng ISO. Ang dokumentong ito ay drafted alinsunod sa mga patakaran ng editoryal ng ISO / IEC Directive Part 2 (tingnan iso.org/directives).

Mangyaring tandaan na ang ilang mga elemento ng dokumentong ito ay maaaring maging paksa ng mga karapatan sa patent. Ang ISO ay hindi mananagot para sa pagtukoy ng anuman o lahat ng naturang patente. Ang mga detalye ng anumang mga karapatan sa patent na natukoy sa panahon ng pag unlad ng dokumento ay matatagpuan sa pagpapakilala at / o listahan ng mga deklarasyon ng ISO Patent na natanggap (tingnan iso.org/patents).

Ang anumang mga pangalan ng kalakalan na ginamit sa dokumentong ito ay ibinigay bilang impormasyon para sa kaginhawahan ng gumagamit at hindi bumubuo ng isang endorsement.

ISO 8502-15-2020 Preparation of steel substrates before painting and related products – Mga pagsubok para sa pagtatasa ng kalinisan ng ibabaw – Bahagi 15: Extraction of soluble contaminants by acid extraction for analysis

For an explanation of the voluntary nature of the standard, the meaning of ISO-specific terms and expressions related to conformity assessment, and information on ISO’s compliance with World Trade Organization (WTO) principles in Technical Barriers to Trade (TBT), tingnan sa

Iso.org/iso/foreword.html.

Ang dokumentong ito ay inihanda ng Technical Committee ISO / TC 35, Mga Pintura at Varnishes, Sub-Committee SC 12, Preparing steel substrates prior to the application of paints and related products.

Isang listahan ng lahat ng mga bahagi sa ISO 8502 serye ay maaaring matagpuan sa ISO website.

Anumang feedback o mga katanungan sa dokumentong ito ay dapat na tinutukoy sa pambansang pamantayan ng katawan ng gumagamit. Ang kumpletong listahan ng mga institusyong ito ay matatagpuan sa iso.org/members.html.

ISO 8502-15-2020 Preparation of steel substrates before painting and related products – Mga pagsubok para sa pagtatasa ng kalinisan ng ibabaw – Bahagi 15: Extraction of soluble contaminants by acid extraction for analysis

ipakilala ang
The performance of protective coatings applied to steel paints and related products is significantly affected by the state of the steel surface prior to coating. The main factors known to affect this performance are:

a) The presence of rust and oxide;

b) the presence of surface contaminants, including salt, alikabok na, oil and grease;

c) Surface profile.

Ang ISO 8501, ISO 8502 at ISO 8503 series are ready to provide methods for assessing these factors, while the ISO 8504 series provides guidance on preparation methods that can be used to clean steel substrates, indicating the ability of each method to achieve a specific level of cleanliness.

These international standards do not contain recommendations for protective coating systems for steel surfaces. They also do not contain recommendations for surface quality requirements for specific situations, even though surface quality can directly affect the choice of protective coating to be applied and its performance. Such recommendations can be found in other documents, such as national standards and codes of practice. Users of these international standards need to ensure that the specified quality is:

– Compatible and appropriate with the environmental conditions to which the steel will be exposed and the protective coating system to be used;

– Within the capacity of the prescribed cleaning procedures.

ISO 8502-15-2020 Preparation of steel substrates before painting and related products – Mga pagsubok para sa pagtatasa ng kalinisan ng ibabaw – Bahagi 15: Extraction of soluble contaminants by acid extraction for analysis

The above four series of international standards cover the following aspects of steel substrate preparation:

Visual assessment of surface cleanliness (tingnan ang ISO 8501 series);

– Surface cleanliness assessment test (tingnan ang ISO 8502 series);

– Sand blasting to clean the surface roughness characteristics of steel substrates (tingnan ang ISO 8503 series);

– Surface treatment method (tingnan ang ISO 8504 series).

Each of these series of international standards is divided into separate sections.

ISO 8502-15-2020 Preparation of steel substrates before painting and related products – Mga pagsubok para sa pagtatasa ng kalinisan ng ibabaw – Bahagi 15: Extraction of soluble contaminants by acid extraction for analysis

Ang dokumentong ito, together with other parts of the ISO 8502 series, specifies tests for surface cleanliness assessment. Related to such tests, there are several methods for extracting and analyzing soluble contaminants on surfaces to be painted. Some of these methods are based on wipes of relatively large test surfaces. This technique provides an average of the pollutants present, but it may hide local concentrations of pollutants. Wipes may not ensure sufficient penetration to dissolve all deep contaminants, such as ferrite. Bukod pa rito, the solvent used will affect the dissolution rate and dissolved contaminants. This document covers sampling with weak acids as solvents.

Gayunpaman, there are other methods that use small cells as liquids to remove and collect surface contaminants. The battery (rigid or flexible) is attached to the test surface where soluble contaminants may be present, such as where pitting occurs. This technique often provides more accurate contaminant point values.

1 Saklaw ng Aplikasyon
This document specifies a method for extracting surface acid-soluble contaminants for analysis using a flexible battery in the form of a patch or sleeve that can be affixed to any surface regardless of its shape (flat or curved) and orientation (facing in any direction, including downward).

ISO 8502-15-2020 Preparation of steel substrates before painting and related products – Mga pagsubok para sa pagtatasa ng kalinisan ng ibabaw – Bahagi 15: Extraction of soluble contaminants by acid extraction for analysis

The method described is suitable for field use to determine the presence of acid-soluble contaminants prior to painting or similar treatment.

This document does not include a follow-up analysis of dissolved contaminants. Analytical methods suitable for field use are described in other parts of ISO 8502 (e.g. ISO 8502-5).

This document is procedurally similar to but not equivalent to ISO 8502-6. The main difference lies in the solvent used and the subsequent analysis that can be performed on the extracted solution.

2 Normatibong mga dokumento ng sanggunian
Kapag ang mga sumusunod na dokumento ay isinangguni sa teksto, ilan o lahat ng mga ito ang bumubuo sa mga kinakailangan ng dokumentong ito. Para sa mga petsang sanggunian, ang binanggit na bersyon lamang ang nalalapat. Para sa mga walang petsang pagbanggit, isang bagong bersyon ng referenced dokumento (kasama ang anumang mga rebisyon) angkop.

ISO 554, Standard Atmospheric specification for conditioning and/or testing

ISO 8501-1, Preparation of steel substrates before painting and related products – Visual assessment of surface cleanliness – Bahagi 1: Grade of corrosion and readiness of uncoated steel substrates and of steel substrates after removal of previous coatings in their entirety

ISO 8503-2, Preparation of steel substrates before painting and related products – Surface roughness characteristics of sandblasted steel substrates – Bahagi 2: Method for grading the surface profiles of abrasive sandblasted steel – Comparison procedure

ISO/IEC 17025, General requirements for testing and calibration laboratory competence

ISO 8502-15-2020 Preparation of steel substrates before painting and related products – Mga pagsubok para sa pagtatasa ng kalinisan ng ibabaw – Bahagi 15: Extraction of soluble contaminants by acid extraction for analysis

3 Mga tuntunin at kahulugan
Walang mga termino at kahulugan na nakalista sa dokumentong ito.

ISO at IEC mapanatili ang mga database ng terminolohiya para sa standardisasyon sa mga sumusunod na address:

– ISO online na platform ng pag browse: iso.org/obp

– IEC Electropedia: available at electropedia.org

Ang standard information section lamang ang pampubliko. Upang makita ang buong nilalaman, kailangan mong bilhin ang pamantayan sa pamamagitan ng mga opisyal na channel.