ASTM D5402, Standard Practice for Evaluating the Solvent Resistance of Organic Coatings Using Solvent Friction, describes a solvent friction technique for evaluating the solvent resistance of organic coatings that undergo chemical changes during curing.
Anlamı ve kullanımı

4.1 Coatings that undergo chemical changes during curing, such as epoxies, vinyl esters, polyesters, alkyd resins and carbamates, become more resistant to solvents when curing. These coatings should reach a specific level of solvent resistance before being applied and put into use; The level of solvent resistance required varies with the type of paint and the intended use. Rubbing with a cloth impregnated with the appropriate solvent is one way to determine when a particular level of solvent resistance has been reached. Fakat, its own level of solvent resistance does not indicate complete cure, and some coatings are already solvent resistant before they are cured sufficiently for service.

ASTM D5402-2019 Standard Practice for Evaluating Solvent Resistance of Organic Coatings Using Solvent Friction

4.2 The time required to achieve specific solvent resistance may be affected by temperature, film thickness, air flow, and humidity for water-based or water-reactive coatings.

4.3 The effect of the test solvent on the coating varies with the type of coating and the solvent used. The paint manufacturer can specify the solvent, the number of two wipes, and the specific test results required.

Adım 1: Kapsam

1.1 This practice describes a solvent friction technique for evaluating the solvent resistance of organic coatings that undergo chemical changes during curing. The technology can be used in the laboratory, in the field or on the manufacturing floor. Test method D4752 is an optional method for ethyl silicate zinc-rich primer.

1.2 This convention does not specify the solvent, the number of wipes or the expected test results.

ASTM D5402-2019 Standard Practice for Evaluating Solvent Resistance of Organic Coatings Using Solvent Friction

1.3 SI birimlerinde ifade edilen değerler standart kabul edilecektir.. Parantez içinde verilen değerler yalnızca referans amaçlıdır.

1.4 Bu standart, kullanımıyla ilgili tüm güvenlik konularını ele almayı amaçlamamaktadır.. Uygun güvenliğin sağlanması bu standardın kullanıcılarının sorumluluğundadır., Sağlık ve çevre spesifikasyonlarını belirlemek ve kullanımdan önce düzenleyici kısıtlamaların uygulanabilirliğini belirlemek. Consult the supplier’s Safety Data Sheet for hazard specific information about the solvents used.

1.5 Bu uluslararası standart, Uluslararası Standartların Geliştirilmesine İlişkin İlkeler Kararında belirlenen uluslararası kabul görmüş standardizasyon ilkelerine dayanmaktadır., DTÖ Ticarette Teknik Engeller Tarafından Yayınlanan Kılavuzlar ve Tavsiyeler (TBT) Kurul.