Semnificație și scop
3.1 Aceste metode de testare pot fi utilizate pentru a determina diferitele etape și rate de uscare, curing and film formation of organic coatings to compare coating types, to assess the effect of compositional changes on drying times, or to assess drying/curing times on the shop floor or in the field. Low temperatures can significantly slow down the drying rate of coatings, so it is often possible to use low-temperature curing agents, catalysts, and/or accelerators to aid in drying and film formation at cooler temperatures. Method B aims to assess these components and/or determine the effect of lower temperatures on drying rates. Conversely, the drying/curing rate of some coatings is accelerated under high temperature/humidity conditions, while others may be adversely affected by elevated humidity. Method C was designed to evaluate the effect of high temperature and relative humidity conditions on drying, curing and film formation of paints and coatings. The terms dry or dry, cured or cured, and film forming are used interchangeably throughout the standard.

3.2 Test Methods A, B and C are limited to comparing paints/coatings applied to smooth, non-absorptive substrates and do not reflect the effect of paint carrier absorption into substrates.

ASTM D 1640-2022: Uscare, Vindecare, și formarea peliculei de acoperiri organice la temperatura camerei

Scopul
1.1 These test methods cover the various stages and rates of film formation during drying or curing of organic coatings under laboratory controlled air temperature (low, ambient and/or elevated) and/or humidity conditions. Procedures for assessing drying under prevailing conditions of workshop and field temperature and humidity are also described.

1.2 Values expressed in SI units or ink-pound units should be treated separately as standard values. The values specified in each system are not necessarily the same; Prin urmare, to ensure compliance with the standards, each system should be used independently of each other and the values of the two systems should not be combined.

ASTM D 1640-2022: Uscare, Vindecare, și formarea peliculei de acoperiri organice la temperatura camerei

1.3 Acest standard nu este destinat să abordeze toate problemele de siguranță, dacă există, asociat cu utilizarea acestuia. Este responsabilitatea utilizatorului acestui standard să stabilească siguranța corespunzătoare, practicile de sănătate și de mediu și pentru a determina aplicabilitatea restricțiilor de reglementare înainte de utilizare.

1.4 Acest standard internațional a fost elaborat în conformitate cu principiile de standardizare recunoscute la nivel internațional stabilite în Decizia privind principiile pentru elaborarea standardelor internaționale., Orientări și recomandări emise de Comitetul pentru bariere tehnice în calea comerțului al Organizației Mondiale a Comerțului.