Paint Committee at Work on New Proposed Standards
Three subcommittees of ASTM Committee D01 on Paint and Related Coatings, Materials and Applications are currently at work on proposed new standards. All interested parties are invited to participate in the development of the following proposed standards.
WK3931 Efflorescence of Latex Coatings
Subcommittee D01.42 on Architectural Coatings has developed a proposed new standard, WK3931, Practice for Evaluating Accelerated Efflorescence of Latex Coatings. According to Daniel Marschall, Marschall Labs, the practice has been developed because, while there are many in-house methods for evaluating latex coating efflorescence, there has not been an ASTM standard covering this subject.
According to Marschall, the practical applications of the proposed standard are the evaluation of sealers, primers or topcoats for efflorescence resistance in an accelerated environment. Without the accelerated tests, you would have to depend on exterior exposure testing, which could take several months for efflorescence to appear, says Marschall. This practice can produce results in four days.
Marschall adds that, while efflorescence is essentially harmless, it is usually very unsightly, and that the proposed practice will provide formulators and testing labs with an easy, reproducible way to evaluate a coating for efflorescence resistance.
For further technical information on WK3931, contact Daniel Marschall, Marschall Labs, Clearwater, Fla. (phone: 727/443-2771).
WK4496 Architectural Paint Films
Subcommittee D01.61 on Paint Application Tools is currently working on proposed new standard WK4496, Practice for Application and Evaluation of Brush and Roller Applied Architectural Paint Films. The proposed practice describes procedures for the application of brush and/or roller applied architectural paint films for evaluating application properties. It will be used to replace the cancelled Federal Test Method Standard 141, Methods 2112 and 2141.
According to Thomas Sliva, DL Labs, Inc., the proposed new practice is based on a test that has been widely used by paint companies for decades. It allows the client to get an evaluation of paint films using typical applicators, such as brushes and rollers, rather than laboratory drawdown applicators, says Sliva.
For further technical information on WK4496, contact Thomas Sliva, DL Labs, Inc., Brooklyn, N.Y. (phone: 718/ 383-5080 ext. 11).
WK3049Concentration of Soluble Chlorides
Subcommittee D01.46 on Industrial Protective Coatings has developed a draft of a proposed new standard, WK3049, Practice for Assessing the Concentration of Soluble Chlorides on Metallic Substrates. This proposed standard covers field procedures for extracting and analyzing water-soluble chlorides from steel and other metallic substrates and determining the surface chloride concentration. Procedures used for extracting chlorides include swabbing, adhesively bonded patch cell, adhesively bonded sleeve and wetted filter paper. Procedures for analyzing chlorides include paper indicator strip, drop titration, ion detection tube, probe-type conductivity meter, and concentric ring conductivity meter. For further technical information on WK3049, contact Dwight Weldon, Weldon Laboratories, Inc., Imperial, Pa. (phone: 724/695-2212).
Committee D01 meets Jan. 23-26, 2005, in conjunction with Committee G03 on Weathering and Durability in Ft. Lauderdale, Fla. For membership or meeting details, contact Tim Brooke, ASTM International (phone: 610/832-9729). //
Copyright 2004, ASTM International