PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Download our free e-book! Overcoating bridges and other structures.

Problem Solving Forum

| More

October 8 - October 14, 2012

What differences in performance and speed do you see among plural-component, conventional airless, and conventional air spraying equipment for field painting structural steel?



More items for Coating Application


Selected Answers

From Charles Williams of kurbtblast on October 8, 2012:
     Difference are with capacity (gpm) and number of passes for adequate millage.

From Giuseppe Santagata of NACE Certif. Coat. Insp. level III # 2737 on October 9, 2012:
 Plural component requires  very expensive equipment, but it is fast with good production, and saves a lot of paint material, etc. This equipment needs a professional operator, especially to be sure to  obtain the correct mix ratio at the tip. Airless is 100% fast with very high production, but in some circumstances you have also 80% of paint loss if not set properly (pressure tip size and angle) and you need professional sprayers. The air spray or conventional spray is slow, produces a lot of dry/overspray, but has the possibility to work better in some difficul areas, as well as the possibility to clean the surface to be coated immediately before spraying by using the air in the gun.

From Jerry Trevino of Protective Liner Systems on October 21, 2012:
     Plural component pumps are very effective in spraying and applying 100% solid materials and are more productive than (hot potting) airless pumps. Conventional air spaying will not pump high solids, thick coatings. In the case of 50% to 60% solid materials, airless (hot potting) may be more efficient. Conventional spraying may be more efficient in applying thin, one to three mils of a top coat for uv protection or for an aesthetic coat over thicker coats of paint on the structural steel. All three types of spraying have their pro's and con's. Plural component spray systems have a high risk of being off ratio. Temperature adjustments may have to be made to attempt to equalize the viscosity of both components. In some cases, for instance, you must heat one of the two components more than the other. Fast-setting materials may only be sprayed with plural systems. The size of the project, location, overspray considerations, target paint thickness, and type of coating used are factors that have to be considered in selecting the type of spraying to be used.

From Jay Barstow of Aeroflor Coating Services on October 16, 2012:
     Definitely, single-component airless hot potting a low-viscosity, solventless resin for DFT/sec/SF application. It's a function of viscosity and heat. I have shot over 3 GPM from single King airless for hours at a time on large flooring projects. Heat, especially in plural component, affects viscosity and flow, but because of internal mixing,  the effective pressure, and thus flow rate, is lost.

From Daniel Liu of APC on February 6, 2013:
    Plural component equipment is very expensive, but easy for operation during  coating application once the mixing ratio is set. Especially for those materials that include more than two parts, it can be faster and safer.
      Airless spray equipment is the most common equipment used on site. For  materials with high volume solids and higher total thickness sprayed on large areas, airless spray will be required, as it is faster and more convenient. Since the liquid is pressured without air, there is less chance of air entrapment in the coating film, which is very common in the shipbuilding coating field.
     Air spray is normally  used in the field where the thickness is mainly less than 100 microns. The coating material is atomized with pressured air, then blown out together with air to the substrate.  The air pressure is not strong enough to convey high solids materials, so air spray is normally used with very low solids and  low viscosity coatings.

Please sign in to submit your answer this question    

Tagged categories: Air spray; Airless spray; Paint application; Plural component spray; Steel


Current PSF Question | Submit a PSF Question | Full PSF Archive

Carlisle Fluid Technologies
Built for Tough Jobs

From Epoxies to Urethanes to other high solid coatings, the new Binks Airless 75 delivers a great finish using an ergonomic design. Visit binks.com for more information.


Novetas Solutions
Number 1 Crushed Glass Abrasive in America!

Manufactured from 100% Recycled Glass.
NO Crystalline Silica,
Beryllium & Arsenic
Great White Metal Finish!
4 plants on Navy QPL
Call us at 866-775-6226


NACE
The latest in Protective Coatings Technology

Examines every generic
type of protective coating
in detail, along with advantages and disadvantages of each. Add it to your library in print or ebook!


Novatek Corporation
Novatek Corporation, Dustless Coatings Removal

Strip, clean and profile all dust free! Comply with new lead standards. Contact today: (866) 563-7800


Nationwide Overspray
Profession Overspray Removal Services

The Finest Name in Safe Overspray Removal. We specialize in removing all contaminants from any surface. Family Owned and Operated for 33 years! Fully insured. Satisfaction is guaranteed.


PSS Industrial Group
AirTech - World Leader in Custom Spray Solutions

AirTech is the solution
for any custom spray application. We have painting & finishing equipment, blast equipment, painting accessories, booth filter and many more items in inventory.


Advanced Recycling Systems
ADVANCED RECYCLING SYSTEMS (ARS)

Recycling Machines, Dust Collectors, Rapid Deployment units are time-tested and approved for the rugged industrial environment. Contact ARS today!
(330)536-8210


Sherwin-Williams
Sherwin-Williams Oil & Gas App

Our coatings and linings expertise available 24/7, allowing you to explore the best Sherwin-Williams solutions for oil refineries, shale drilling sites, and offshore. Download today!


ABKaelin, LLC
ABkaelin, LLC

SSPC C3 & C5 TRAINING
QUALITY PROGRAM/CERTIFICATION SUPPORT – ISO,NQA-1, AISC SSPC QP and QS.
MONITORING-Environmental and worker monitoring CONSULTING & INSPECTION – Coatings, EHS, and compliance.
www.abkaelin.com


Safway Services
Safeguard Assets. Ensure Productivity. HAKI®

Protect assets and equipment. Keep facilities open and operational. Maintain schedules regardless of weather. Ensure smooth and continuous production. Easy to erect. Safway is the primary distributor of HAKI® products including HAKISPAN and HAKITEC® 750 – in North America.

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2016, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com