ASME A112.18.1:2003 pdf download PLUMBING FIXTURE FTTINGS
2.2.2 Electrodeposited Coatings on Plastics
(a) Appearance. The significant surfaces of the platedarticle shall be free of surface defects, roughness, anduncoated areas, and shall not be stained. Except as notedin para. 2.2.3, fittings that are wholly or partially nonme-tallic shall meet the following requirements when testedin accordance with para.22.2(b).
(1) No surface defects shall be present on significantsurfaces.
(2)Nonsignifcant surfaces, gates, and parting linesmay have minor cracks no longer than % in. (6 mm)provided there is no loss of adhesion between the bastmaterial and the coating.
(3) Blisters not exceeding 0.01 in.2 (6 mm?) in areashall be acceptable within % in.(6 mm) of an injectionpoint. In the case of an injection point being within 1in. (6 mm) of a significant surface, para. 2.2.2(a) shallapply.
(4) Warpage shall be permitted only where it doesnot affect the performance of the part.
(b) Thermal Cycling. Under dry conditions, fittingsshall be subjected to temperatures of 69.8F(2C) and40”F(-40C) consecutively for three complete cycleswith 1 hr exposure at each temperature for each cycleNo temperature stabilization period shall be allowedwhen changing from one temperature environment tothe other.
Between 12 hr and 48 hr after completing the testdescribed above, the fitting shall be alternately dippedin water baths maintained at 174.2°F +F(79.0C0.5°C) and 70.7°F 1F(21.5C 0.5C), for 450 cyclesFittings shall be totally immersed in each bath for 40sec and no stabilization period shall be allowed whenswitching from one bath to the other. For plastic components of sink strainer assemblies, the dwell time in eachbath shall be 2 min instead of 40 sec.
(c) Corrosion Test. Electrodeposited coatings shall besubjected to the corrosion test of ASTM B 604 for theapplicable service condition as defined in para. 2.2.4.After exposure, there shall not be more than one surfacedefect per 1 in.2 (645 mm?) of the significant surface areaor up to three surface defects on a 1 in. (25 mm) lengthof parting line, or exposure of the substrate. Surfacedefects shall not be more than 0.03 in. (0.8 mm) in anydimension.
2.2.3 Decorative Organic Coatings, Fittings, or partsof fittings, that have a decorative organic finish, regardless of substrate material, and are designed to be mounted on a fixture or otherwise installed above thedeck (this excludes flexible supply stops and risers) neednot comply with para. 2.22(b) and instead shall meetthe following requirements:
(a) When tested in accordance with paras. 2.2.3.12.2.3.2, and 2.2.3.3 using separate test specimens. Afterexposure, there shall not be more than one surface defectper 1 in.’ (645 mm) of the significant surface area. Surface defects shall not be more than 0.03 in.(0.8 mm) inany direction.
(b) The finish shall have an adhesion rating of 3A orbetter when tested in accordance with para. 2.2.3.4.
(c) The finish shall not erode to the point of exposingthe surface directly beneath when tested in accordancewith para.2.2.3.5.
2.2.3.1 Corrosion Test specimens shall be tested inaccordance with ASTM B 456 to Service Condition #2ASTM G 85，Test Method Annex A1 shall also be anacceptable method instead of ASTM B 287.
2.2.3.2 Water Degradation. Test specimens shall beimmersed in distilled water maintained at 100°F + 2°F(38°C+1C) for 24 + 0.5 hr in a corrosion-proof containerand then removed and examined.
2,2.3.3 Soap and Cleaner Effects. Two drops (0.10ml) of each of the following solutions shall be appliedto the organic coating (preferably on a flat surface) andallowed to remain there for 16 hr(a) ammonium hydroxide (6N);(b) sodium hydroxide (6N);
(c) methanol (100%); and
(d)surfactant (100% polyethylene oxyethanol)?At the end of this period, the excess liquid shall beremoved and the coating examined.
2.2.3.4 Adhesion. Test specimen shall be tested inaccordance with Method A of ASTM D 3359.
2.2.3.5 Abrasion Resistance. Test specimen shall betested in accordance with Method A of ASTM D 968using 12 L of silica sand on a relatively flat surface ofthe specimen.
2.2.4 ServiceConditions.Exposed fittings andexposed parts of concealed fittings shall be tested to therequirements of Service Condition #2 (SC-2). All otherfittings shall be tested to the requirements of ServiceCondition #1(SC-1).