air and water pollution control

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Page 1: Air and water pollution control

Stevens, E. (II), U.S. Patent 5,427,710 Visaisouk, S., and S. Vixaysouk, U.S. Patent

S,367,838, assignors to Ice Blast International Inc.

Ward, I.E., US. Patent 5,417,877, assignor to Ashland Inc.

TESTING AND CONTROL

Boocock addressed joint industry ef- forts to improve procedures for testing of maintenance coatings. A test com- parison of EPA Method 24 (ASTM D 3960) and a new method proposed by California Polytechnic for measure- ment of VOCs in water-based paints was reported by Jenkins et al. Sellars compared calibration procedures for induction and eddy current thickness test gauges and discussed problems as- sociated with measurements on rough substrates. A high-solids paint viscom- eter won a patent for Burke.

The multidimensional character of the gloss and reflection properties of surfaces was noted by Kigle-Boeckler, who noted the importance of including haze and orange peel with specular gloss to obtain an entire visual impres- sion. A goniospectrophotometer for controlling the color of metallic and pearlescent automotive coatings was described by Saul. Liszewski used a spectrophotometer to monitor the color of coated coil on-line. The surface structure of latex films was determined by Butt and Kuropka with an atomic force microscope. A method for mea- suring water diffusion in a coating ap- plied to a substrate, Fourier transform infrared multiple internal reflection, was reported by Nguyen et al.

Automation of process controls to lower costs was discussed by Skelton- Baker and Guskov, who suggested au- totrigging for guns to reduce paint us- age, and proper positioning for improved transfer efficiency. Oven temperature profiling to improve qual- ity and productivity was addressed by Ohaus, and by Witham. Tu obtained a patent for a method of controlling and smoothing the coating on a strip.

Crewdson and Brennan reviewed basic exposure procedures for outdoor weathering. A mathematical model to predict blistering of coatings on steel was proposed by Pommersheim et al. Dickie provided an overview on paint adhesion, corrosion protection, and in- terfacial chemistry. He noted that maintaining adhesion was the key to

corrosion protection. Measurement of coating adhesion using peel tests was the subject of an article by McKnight et al. Ramamurthy et al. provided two procedures for estimating impact-in- duced corrosion in a discussion of stone impact damage. A method and apparatus for determining the quality of a coating using a potentiostat won a patent for Shih and Mekhjian.

References Boocock, S.K., Journal of Protective Coatings

and Linings, 12(9):70; 1995 Burke. T.J., U.S. Patent 5,372,034, assignor to

FMC Corp. Butt, H.J., and R. Kuropka, Journal of Coatings

Technology, 67(848): 101; 1995 Crewdson, M.J., and P. Brennan, Journal of Pro-

rective Coatings and Linings, 12(9):17; 1995 Dickie, R.A., Progress in Organic Coatings,

25(1):3; 1994 Jenkins, V.C.B., et al., Journal of Coatings Tech-

nology, 67(841):53; 1995 Kigle-Boechler, G., Metal Finishing, 93(5):28;

1995 Liszewski, G., Industrial Paint and Powder;

71(5):36; 1995 McKnight, M.E., et al., Journal of Protective

Coarings and Linings, 12(5):82: 1995 Nguyen, T., et al., Journal qf Coatings Technol-

ogy, 67(844):37; 1995 O’Haus, R.W., Powder Coating, 6(6):25; 1995 Pommersheim, J.M., et al., Progress in Organic

Coatings, 25( 1):23; 1994 Ramamurthy, A.C., et al., Progress in Organic

Coatings, 25(1):43; 1994 Saul, E, Industrial Paint and Powder, 71(7):34;

1995 Sellars, I.C., Metal Finishing, 93(7):26; 1995 Shih, H., and M. S. Mekhjian, U.S. Patent

5,373,734, assignors to FMC Corp. Skelton-Baker, CA., and S. Guskov, Powder

Coating, 6(5):59; 1995 Tu, C.V., U.S. Patent 5,360,641, assignor to John

Lysaght (Australia) Ltd. Witham, P.J., Products Finishing, 59(10):56;

1995

AIR AND WATER POLLUTION CONTROL

Practical considerations in the de- sign and installation of permanent total enclosures to capture all VOC emis- sions from finishing operations were discussed by Frankel and Bisonett. Platek addressed monitoring of con- fined spaces for atmospheric hazards. The effects of enhanced monitoring at paint and coating facilities to comply with the requirements of Title V under the Clean Air Act Amendments were noted by Falcone. Lehner described procedures for automating environ- mental compliance system record keeping.

Brooks reviewed the factors to be Circle 96 on reader information card

METAL FINISHING ?? FEBRUARY 1996 57

Page 2: Air and water pollution control

considered for selection of a VOC abatement system. The use of thermal regenerative oxidizers for control of VOC solvent emissions was discussed by Wikenczy. Bayer and Heard pat-

A case study on recycling overspray

ented a thermal regenerative oxidizer

from a high-solids painting operation was reported by Sekelsky. Mitchell

system. Emission reduction options for

and Spangler presented a case study on the recovery, reclamation, and recy-

painting operations were offered by

cling of water-washed overspray paint. A process for reusing the overspray

Hussey.

from spraying an aqueous two-compo- nent polyurethane coating was pat- ented by Hovestadt et al. Processes for recovering the overspray from aqueous coating operations using ultrafiltration were the subject of patents granted to Bhatnagar et al. (II), and to Saatweber et al.

Bhatnagar et al. (I) obtained a patent for an apparatus for removing wax par- titles from circulating water in spray

booths using a floating pump arrange- ment. An electrophoretic method for separating collected overspray from waterborne coating won a patent for Freese and Gunter. Waite patented a

Detackifying compositions for treat- ing overspray from paint booths were

process for recovering zinc phosphat-

the subject of patents granted to Mi- zuno and Horiuchi, to Liao and Pur- nell, and to Zuemer et al. Brown ob-

ing make-up feed from zinc phosphate

tained a patent for a method and

sludge. A paint solvent recycle device

composition for treatment of organic strippers containing metals.

earned a patent for Lewis.

References Bayer, C.E., and W.G. Heard, U.S. Patent

5,376,340, assignors to ABB Air Preheater IX.

Bhatnagar, S., et al. (I), U.S. Patent 5,370,792, assignors to Duerr GmbH

Bhatnagar, S., et al. (II), U.S. Patent 5,443,738, assignors to Duerr GmbH

Brooks, J., Pro&Acts Finishing, 59(8):72; 1995 Brown, J.A., U.S. Patent 5,422,032, assignor to

- Viktron Limited Partnership

Webster Pumas Don’t Jusl Stand UB To Corrosive Chemicals,

They Sland The Test Of Time. Whether they’re pumping for aeration,

agitation, filtration, recirculation, spraying or transfer, Webster’s rugged, continuous duty pumps are ideal for the plating, electronics, photo processing, pollution control, chemical processing and water treatment industries.

Both our Vertical Seal-less Immersibles and our Horizontal End-Suction Centrifugals are avail- able in your choice of corrosion-resistant CPVC,

Polypropylene or PVDF (Solef@) with non-metallic construction so that no metal parts come in contact with

corrosive chemicals. Dependable and cost-effective, Webster Pumps can handle applications ranging from 5 to over 100 gallons per minute.

For the name of a Webster Pumps distributor or to discuss your specific application requirements, call l-800-766-1950.

Webster Pumps” Distributor Territories Available.

Circle 086 on reader information card

Falcone, S., Metal Finishing, 93(8): 12; 1995 Frankel, I., and G. Bisonett, Journal ofcoatings

Technology, 67(846):63; 1995 Freese, K-H., and G. Gunter, U.S. Patent

5,393,390, assignors to Akzo Nobel NV Hovestadt, W., et al., U.S. Patent 5,453,460,

assignors to Bayer AG Hussey, F., Industrial Paint and Powder; 71(3):

12; 1995 Lehner, K.A., Industrial Paint and Powder;

71(3):18; 1995 Lewis, H.B., U.S. Patent 5,382,362, assignor to

Paint-Mate Inc. Liao, W.P., and D.L. Purnell, U.S. Patent

5,385,676, assignor to Betz Laboratories Mitchell, G.M., and J.M. Spangler, Plating and

Surface Finishing, 82(7):9; 1995 Mizuno, K., and M. Horiuchi, U.S. Patent

5,378,389, assignor to Kurita Water Indus- tries Ltd.

Platek, M.J., Journal of Protective Coatings and Linings, 12(3):72; 1995

Saatweber, D., et al., U.S. Patent 5,453,301, assignors to Herberts GmbH

Sekelsky, T., Industrial Paint and Powder, 71(10):26; 1995

Waite, M.D., U.S. Patent 5,376,342 Wikenczy, J.P., Products Finishing, 60(1):54;

1995 Zuemer, E.C., et al., U.S. Patent 5,397,496, as-

signors to Nortru Inc.

For a Fr: BjooI-I-Gt

ire e

MF

1 on Reader Setice Card

Patent 6435457

. Prevents loss of parts during process.

??No current interference, and contact- ing parts to cause defects as bag would.

??Ligt weight, eas.yAandling and rinsing.

??Standard and custom sizes available.

??A&foroae&uld/ord

MICROPROCESS LABORATORY INC. 7424 Lorge Circle

Huntington Beach, CA 92647 (714) 842-6286

Circle 95 on reader information card

58 METAL FINISHING ?? FEBRUARY 1996