المعنى والغرض
3.1 أي آثار, مثل تغيير اللون, لاذعة. مراقبة وملاحظة فقدان الالتصاق, softening or brittleness.

نطاق
1.1 The practice consists of determining the failure resistance of organic finishes immersed in detergent solutions in an accelerated manner.

1.2 تعتبر القيم المعبر عنها بوحدات النظام الدولي (SI) بمثابة معايير. Values in parentheses are for reference only.

1.3 ليس المقصود من هذا المعيار معالجة جميع قضايا السلامة (meaning and purpose) المرتبطة باستخدامه

4.1 للعديد من التطبيقات, the ability of a paint or coating to resist deterioration of physical and optical properties due to exposure to light, حرارة, and water may be very important. This practice aims to cause changes in attributes related to end-use conditions, including the effects of sunlight, رُطُوبَة, and heat. The exposures used in this practice are not intended to model the deterioration caused by local weather phenomena such as atmospheric pollution, biological attack, and saline-water exposure.

4.2 Caveats – Results may change when different operating conditions are used. لذلك, no reference to the use of this practice may be made unless accompanied by a report prepared under Section 10 describing the specific operating conditions used. See Practice G151 for details of the caveats applicable to the use of the results obtained under this practice.

أستم د 5031-2018 “اختبار التعرض لقوس الكربون المغلق للدهانات والطلاءات ذات الصلة”

ملحوظة 2: For additional information on sources of variability and strategies to address variability in the design, execution, and data analysis of laboratory accelerated exposure trials, انظر الدليل G141.

4.2.1 The spectral power profiles of light from a closed carbon arc are significantly different from those generated by light and water exposure devices using other carbon arc configurations or other light sources. The type and rate of degradation and performance ranking generated by exposure to closed carbon arcs may be quite different from those generated by exposure to other types of laboratory light sources.

4.2.2 Inter-laboratory comparisons are valid only if all laboratories use the same type of carbon arcs, المرشحات, and exposure conditions.

4.3 The reproducibility of test results between laboratories has been shown to be good when evaluating the stability of the material according to the performance class compared to other materials or controls. رابعا,5 لذلك, it is highly recommended to expose similar materials with known properties (يتحكم) في نفس الوقت مع مادة الاختبار. At least three replications of each material are recommended to allow statistical evaluation of the results.

4.4 Test results will depend on the degree of care taken to operate the equipment according to practice G153. Important factors include regulation of line voltage, absence of salt or other water deposits, temperature and humidity control, and electrode conditions.

4.5 All exposures referred to in accordance with this practice shall include a complete description of the test period used.

أستم د 5031-2018 “اختبار التعرض لقوس الكربون المغلق للدهانات والطلاءات ذات الصلة”

نطاق
1.1 This procedure covers the selection of test conditions for accelerated exposure testing of coatings and related products in closed carbon arc units operated in accordance with practices G151 and G153. The practice also includes preparation of specimens, suitable test conditions for coatings, and evaluation of test results. طاولة 1 describes the commonly used test conditions.

1.2 This practice does not include filtered open-flame carbon arc exposure of paints and associated coatings, as described in Practice D822/D822M. Practice D3361/D3361M covers an additional procedure for exposing these products, where specimens are exposed to radiation from an unfiltered open flame carbon arc that produces shorter wavelengths and higher levels of shorter-wavelength radiation than a filtered open flame or closed carbon arc.

ملحوظة 1: Practice D3361/D3361M requires the use of an open flame carbon arc device with automatic humidity control.

1.3 Values expressed in SI units or inch-pound units should be treated separately as standard values. The values specified in each system may not be exactly equivalent; لذلك, each system should be used independently of each other. Merging the values of the two systems may result in non-compliance with the criteria.

1.4 ليس المقصود من هذا المعيار معالجة جميع قضايا السلامة, لو اي, المرتبطة باستخدامه. تقع على عاتق مستخدم هذه المواصفة القياسية مسؤولية تحديد السلامة المناسبة, الممارسات الصحية والبيئية وتحديد إمكانية تطبيق القيود التنظيمية قبل الاستخدام.

أستم د 5031-2018 “اختبار التعرض لقوس الكربون المغلق للدهانات والطلاءات ذات الصلة”

1.5 تم تطوير هذه المواصفة القياسية الدولية وفقًا لمبادئ التقييس المعترف بها دوليًا المنصوص عليها في القرار الخاص بمبادئ تطوير المعايير الدولية, المبادئ التوجيهية والتوصيات الصادرة عن لجنة الحواجز الفنية أمام التجارة التابعة لمنظمة التجارة العالمية. If any). تقع على عاتق مستخدم هذه المواصفة القياسية مسؤولية تحديد السلامة المناسبة, الممارسات الصحية والبيئية وتحديد إمكانية تطبيق القيود التنظيمية قبل الاستخدام.

1.4 تم تطوير هذه المواصفة القياسية الدولية وفقًا لمبادئ التقييس المعترف بها دوليًا المنصوص عليها في القرار الخاص بمبادئ تطوير المعايير الدولية, المبادئ التوجيهية والتوصيات الصادرة عن لجنة الحواجز الفنية أمام التجارة التابعة لمنظمة التجارة العالمية.