SURFACE CLEANLINESS, -PROFILE, -ROUGHNESS

A clean and well prepared surface is crucial for a successful coating performance.

The pre-treatment process of an industrial coating job often consumes more time and budget than the actual paint application itself.

Surface preparation
There are various methods and systems to prepare a surface prior to the coating application. Depending on the project and job specifications one could choose for hand cleaning like ...
A clean and well prepared surface is crucial for a successful coating performance.

The pre-treatment process of an industrial coating job often consumes more time and budget than the actual paint application itself.

Surface preparation
There are various methods and systems to prepare a surface prior to the coating application. Depending on the project and job specifications one could choose for hand cleaning like brushing, grinding or using needle hammers. Often grit blasting is utilised or shot blasting in automatic line for example. If no anchor pattern is required or already in place (ultra) high pressure water jetting, chemical cleaning or a simple wash down might be the solution.

Although it seems quite obvious often the parameters cleanliness and profile are mixed up.

Cleanliness
Cleanliness is providing information about the level of contaminants which are left on the surface. This contamination could be (blast) dust, soluble salts like chlorides, old paint residues, oil and fat, (flash) rust, mil scale, condensation and moisture, amines, etc..

Surface contamination can be caused in many different ways like insufficient cleaning, residue left after (acid) rain showers, sea salt left on the surface in maritime environments, soluble salts introduced by contaminated recycled blasting media and many others.

Therefore it is important to check for surface cleanliness at the right moment in the process. It is necessary to check the levels of cleanliness after the surface prep but keep in mind during the "open time" (which varies from hours to days) of the steel new contaminations can be introduced when the work is insufficiently shielded.

Golden rule: Always inspect for surface cleanliness just prior to paint application!

Surface profile
Surface profile, also addressed as surface roughness or anchor pattern is another parameter that plays an important role in the surface prep process. Besides a clean surface a certain roughness may be required to assure proper adhesion of the paint or coating to the surface.

By creating a rough surface with "peaks and valleys" one is more or less increasing the total surface area thus creating a larger bonding area for the paint to stick. Paint specifications often require a certain surface roughness or anchor profile in order to guarantee the performance of coating system. A surface profile which is too low may cause adhesion problems. However a surface profile which is too coarse could effect that the primer coating is not covering the "peaks" of the anchor pattern which may lead to premature corrosion or other problems with the intermediate or top coat. A coarse surface also leads to an increase of the paint consumption.

Creating a specified surface profile is not an easy job. The profile is determined by the size, type and hardiness of the abrasive being used, the air pressure, and by the distance and angle of the nozzle to the surface.
Standards News FAQ Links

AMINE BLUSH KIT

The TQC Amine Blush Kit is a multi step amine blush indicator. Due to advanced research on suitable media the TQC Amine Blush Kit is the most advanced kit on the market. Based on a double colour change the indicator is the first to ...

BRESLE KIT - CHLORIDE TEST KIT

The TQC Bresle Kit - Chloride Test Kit complies with the ISO 8502-6 and ISO 8502-9 standards that describe the Bresle Method to assess the level of soluble salts using a Bresle patch or Bresle sampler, distilled water and a conducti...

BRESLE METHOD

The bresle method according the ISO 8502-6 standard describes a method of extraction of soluble contaminants from a surface by means of adhesive TQC Bresle Patches which can be attached to any surface, regardless of its shape and or...

BRESLE PATCH FOR BRESLE KIT

The TQC Bresle Patch is used to test for surface contaminants, such as salt, which may cause major problems and increase maintenance costs for shipping, vessels, ballast tanks, oil and gas piping, industry buildings and steel struct...

CARBONATATION LIQUID

A liquid, which determines whether a concrete surface is alkaline or acidic. Indispensable when painting or repairing concrete. Obtainable in 250ml. bottles with a handy pump-action atomiser.

CHLOR*TEST

CHLOR*TEST was developed for ease of use and to prevent outside and cross contamination. The components are premeasured to ensure accurate results in parts per million and micrograms per square centimeter. In addition, no temperatur...

CONDUCTIVITY GAUGE ECOSCAN COND 6PLUS KIT

Powerful portable conductivity gauge with large measuring range. Equipped with Cond 6+ Conductivity Meter, electrode & Conductivity Carrying Kit (Includes 1 x 1413 uS, 12.88 mS, 84 uS KCl Standard Solution and 1x Deionised (Rins...

D-MATCH 2 - work light for detailing and colour match

Strongest detailing work light on the market at all, providing up to 5000 lumen. Our novel D-MATCH 2 is a part of a completely new concept of specialized work light solutions designed for the detailing and paint industry.   ...

DEFELSKO POSITECTOR RTR TAPE READER

Digital spring micrometer measures and records peak to valley surface profile height using replica tape.All PosiTector 6000 probes can be used with the PosiTector SmartLink; a small piece of hardware that physically connects to new ...

DEWCHECK 4 DOCKING STATION

For optimal use of the datalogging facilities of the instrument the TQC DewCheck 4 Docking Station is available. The Docking Station is provided with 3 strong Neodymium magnets which hold instrument and dock firmly against ferrous s...

DEWCHECK 4 SERIES 2 - DEWPOINT METER

The TQC DewCheck 4 - Dewpoint Meter (DPM)/ Dewmeter is an extremely versatile dewpoint meter to measure and record all climate parameters required to treat surfaces. This easy to use and robust dewmeter conforms to ISO 8502-4 & ...

DEWMAG MAGNETIC THERMO - HYGROMETER

Dewmag Magnetic Thermo - Hygrometer , for use during application of protective coatings. Thermo-hygrometer containing a combination of a precision hygrometer and two bimetal-thermometers. The relative humidity and temperature scale...

DEWPOINT CALCULATOR

The TQC Dewpoint calculator is a handy tool to determine dewpoint temperature based upon the measurements from the sling psychrometer. Includes a Celsius / Fahrenheit converter.

DIGITAL USB MICROSCOPE WITH LCD SCREEN

Small, portable, inexpensive and easy microscope with LCD display that can be connected directly to a PC. Supplied with software for immediate inspection and measuring. The unique optical design combines the advantages of a USB-micr...

DUST TEST KIT

The TQC Dust Test Kit according to ISO 8502-3 allows assessment of the quantity and size of dust particles on surfaces prepared for painting. Dust on blast cleaned surfaces can reduce coating adhesion, leading to premature coating f...

FILM THICKNESS GAUGE FTG2000

The TQC Film thickness gauge is a high precision film and foil thickness gauge, especially developed for measuring so-called "replica tapes" as Testex®, used mainly to measure the surface profile. The large clear display makes ...

FITZ S ATLAS 2 OF COATING DEFECTS

The Fitz's Atlas 2 of coating defects is a reference manual with over 300 colour images, providing a clear and concise description of all problems that could occur, as well as their possible causes.The book is divided into the follo...

Hull Roughness Gauge

TQC has made the next evolutionary step in hull roughness surveys. Surpassing the industrial standards with an easy to operate 4-way directional push button, graphical representations, storage of data in multiple batches and survey ...

I-MATCH - RECHARABLE HEADLAMP FOR DETAILING AND COLOUR MATCH

Superior hands-free illumination for any detailing job Introducing the next generation I-MATCH 2 which is part of a completely new concept of specialized work light solutions designed for the detailing and paint industry. Supplied...

INSPECTION MIRROR TELESCOPIC (ANTENNA-TYPE) - ROUND

Perfect tool to use for inspection of professional coating jobs on large structures, ships, tanks, buildings etc.. The inspection mirrors offers a clear view on hard-to-reach places and ideal for a visual inspection for “holy-...

ISO 8501-1 2007 - THE RUST GRADE BOOK

In 2007 updated version of the standard measure for the visual evaluation of rust and purity levels of non-coated steel. Also known as the "Swedish steel blasting grades" SS 05 59 00 (Sa). Contains high-quality colour photographs fo...

ISO 8501-2 - GRADES OF REMOVAL PREVIOUS COATINGS

Purity levels of painted steel surfaces from which the paint layer has been weathered in places. Indispensable when repairing damage to corrosion-resistant paint systems and in the conservation or, for example, welding joints after ...

ISO 8501-3 2006 - ILLUSTRATED EDITION

ISO8501-3:2006 describes preparation grades of welds, cut edges and other areas, on steel surfaces with imperfections. Such imperfections can become visible before and/or after an abrasive blast-cleaning process. The preparation gr...

ISO 8501-4 2006 - ILLUSTRATED EDITION

ISO 8501-4:2006 is a hardback A5-format book in three languages (English, French and German) which specifies a series of preparation grades for steel surfaces after removal/partial removal of water-soluble contaminants, rust, previo...

KTA KEANE-TATOR SURFACE PROFILE COMPARATOR

Comparators for determining surface roughness by touch and sight. Conforms to ASTM D4417. The KTA standard has 5 different grades of roughness and is available in three different versions. Available in Imperial units only.

LED POCKET FLASHLIGHT

This powerful TQC LED pocket flashlight produces a very impressive 200 lumens and provides a projection distance of 250 meters. Small (26 x 118mm), portable and light weighted (73gr) The light is supplied with holster, wriststrap, 3...

MATCHPEN COLOUR MATCHING LIGHT

MATCHPEN is a small penlight easy to carry and always at hand in the pocket. The light output is very powerful with excellent colour recognition properties. MATCHPEN is with focus function for concentrated and focused light be...

MULTIMATCH 2 - COLOUR MATCHING LIGHT

Powerful and rechargeable work light for detailing providing up to 2500 lumen. The next generation MULTIMATCH 2 is a part of a completely new concept of specialized work light solutions designed for the detailing and paint industry...

NOVEX STEREO MICROSCOPE RZ

These 0,65x - 4,5x zoom microscopes of exceptional quality for industrial applications, can achieve 2,6x up to 180x times magnification at working distances respectively from 225 to 25 mm. Please contact us for more information....

PALMTOP SALINITY METER ECOSCAN SALT 6

EcoScan Salt 6 for quick, accurate salinity measurements in laboratories, field and schools. The instrument has a lot of unique features like push-button Calibration with ±1% full scale accuracy, Automatic Temperature Compens...

PH CONDUCTIVITY-METER CYBERSCAN PC10

Extremely handy gauge for determining pH (acidity), conductivity and temperature of liquids. The different probes are combined in a waterproof casing. Large display shows various parameters simultaneously.Kit contains:Waterproof Cyb...

pH meter pHTestr30 waterproof

Ideal for quick and accurate pH checks in pools and spas, aquariums and hydroponics operations, or anywhere frequent pH testing is required. pHTestr 30 meets requirements for many standard environmental and ASTM test methods....

PH-METER PH 5PLUS

Easy to use, robust pH meter. Equipped with pH 5+ pH Meter with Single Junction pH Electrode, ATC Electrode & pH Carrying Kit Set (Includes 1 x pH 4.01, pH 7.00 Buffer Solutions, Storage Solution & 1 x Deionised (Rinse) Wate...

PH-METER PH TESTR 10 (WATERPROOF)

Easy-to-use, fully waterproof, pH meter with large display. Floats. The modular design makes it extremely easy to change electrodes. The PH meter is equipped with automatic calibration with buffer recognition. The accuracy of the me...

PosiTector 6000 SPG Surface Profile Gauge probe

With the new Surface Profile probe you can use the body of the PosiTector 6000 as a SPG Surface Profile Gauge. The SPG Surface Profile probe measures and records peak to valley surface profile heights. Conforms to ASTM D4417-B, ...

PRETREATMENT TEST KIT (PTK)

The TQC Pretreatment Test Kit is especially composed to control all relevant parameters during the pretreatment of steel prior to painting. The PTK is available as BASIC KIT and FULL KIT. The strong double walled suitcase holds a s...

RUGOTEST

Rugotest no. 3 comparison standard for blasted surfaces consisting of 6 examples of grit-blasting and 6 examples of shot-blasting. The method complies with ASTM D 4417/A. Supplied with a case.

SAFETY SPECTACLES WITH UV-FILTER

Safety goggles with 100% UV filter, anti-scratch and anti-condensation. Molded in sideshields for maximum protection and wide field of vision. Compatible with 9300 series dust mask. Blue frame with yellow lenses, weight 24 grams....

SCANGRIP TRIPOD

Stationary and flexible positioning of work lightsThe SCANGRIP TRIPOD is designed to meet any working situation where flexible illumination is key. Extendable from 1.35 m to 3 m, the tripod offers complete flexibility to position th...

SHIP PROPELLER ROUGHNESS COMPARATORS

TQC Ship Propeller Roughness Comparators to the estimate the surface roughness by both touch and sight. The TQC Ship Propeller Roughness Comparators are developed for the specific profiles related to the condition of ships propeller...

SLING PSYCHROMETER

Bacharach type sling Psychrometer for indicating percent relative humidity on the basis of the wet bulb-dry bulb thermometer principle. The plastic case of the instrument is equipped with conversion scale for calculating the percent...

SPRING LOADED ROLLER FOR DUST TEST TAPE

The TQC Spring Loaded Roller is used to perform objective dust tests according ISO 8502-3, and eliminates the human error by pressing with a constant force on the dust test tape. The ISO 8502-3 quantifies the quantity and size of du...

SSPC-VIS 1 PICTORIAL SURFACE STANDARD DRY BLAST CLEANING

Guide and Reference Photographs for Steel Surfaces Prepared by Dry Abrasive Blast Cleaning. SSPC's most widely used visual reference features over 50 full-color photos of previously coated and uncoated, rusted steel surfaces before ...

SSPC-VIS 2 Pictorial rust standard

Standard Method of Evaluating Degree of Rusting on Painted Steel Surfaces. SSPC's popular rust standard features a series of 27 full color images and 27 black and white diagrams representing various degrees of spot, general, and pin...

SSPC-VIS 3 Pictorial Surface standard Hand | Power Tool

Guide and Reference Photographs for Steel Surfaces Prepared by Hand and Power Tool Cleaning Contains a series of 43 full-color reference photographs to be used as a supplement to the SSPC standards for hand and power tool cleaned s...

SSPC-VIS 4|NACE VIS 7 PICTORIAL STANDARD WATERJETTING

Guide and Reference Photographs for Steel Surfaces Prepared by Waterjetting Shows a total of six different steel surfaces (two uncoated and four previously coated) before and after waterjetting. Photographs illustrate four separate...

SSPC-VIS 5|NACE VIS 9 Wet abrasive Blast Cleaning

Guide and Reference Photographs for Steel Surfaces Prepared by Wet Abrasive Blast Cleaning Pictorial Standard shows two uncoated, rusted steel surfaces (Conditions C and D) before and after wet abrasive blast cleaning. Photographs ...

STEEL SURFACE ROUGHNESS COMPARATOR

Comparison standard according to ISO 8503 part 1 made of quality steel. Indicates the surface condition of blasted steel according to ISO 8503 in grades of fine, medium, and coarse. Can be used in accordance with ASTM D4417 Method ...

SUNMATCH 2 - COLOUR MATCHING LIGHT

The next generation SUNMATCH 2 is a part of a completely new concept of specialized work light solutions designed for the detailing and paint industry. Easy to carry in the pocket or in the work belt with the built-in clip, th...

SURFACE MICROSCOPE

Graduated Surface microscope with built-in LED ring light and measuring scale in pocket size complete with hard leather case. Ideal for inspecting, tracking, and measuring coating defects such as crack-width, pinhol...

SURFACE MICROSCOPE WITH ILLUMINATION

TQC Illuminated hand-held surface microscope with a built-in lamp for surface inspections. Magnification 40x, and equipped with a focus wheel to adjust the focus, a measuring reticle and an adjustable direct light source. Delivery i...

SURFACE PROFILE AND COATING THICKNESS GAUGE

The TQC Surface Profile & Coating Thickness gauge is a combination gauge. that can be equipped with two different tips, one for surface roughness and another for coating thickness. Supplied with a sharp tungsten carbide replac...

SURFACE ROUGHNESS GAUGE

The TQC surface profile roughness gauge is a simple instrument for ultrafast measuring of the point peak-to-valley height of a surface. The shape of the base makes this instrument ideal to measure the height of welds. Technical Spe...

SURFACE ROUGHNESS GAUGE SJ-210 WITH SJ-TOOLS

Surface Roughness Meter SJ-210 offers a choice of 39 roughness parameters (according to DIN EN ISO, VDA, JIS, ANSI, MOTIF and freely selectable variables) and a probe geometry according to DIN EN ISO 3274: 2 ìm / 60 ° (re...

TANK COATINGS CONDITION GUIDE

A guide to assist ship’s staff in the assessment of tank, hold and space coatings of existing ships for the purpose of determining compliance with the Rules and Regulations for the Classification of Ships. The guide handles th...

TAPES FOR ADHESION-, DUST-, ROUGHNESS- and TEMPERATURE TESTS

These different TQC tapes are suitable for carrying out various tests such as the adhesion-cross cut test, the dust test, the surface roughness test with the so-called Testex films, coarse or X-coarse and tapes for curvex temperatur...

TELESCOPIC INSPECTION MIRROR - ROUND

The TQC Telescopic Inspection Mirror with high quality chrome shaft is originally manufactured for inspection of aircraft's. These inspection mirrors are perfect for inspection of the invisible, hard to reach, behind view spots and ...

TESTEX REPLICA TAPE, PRESS O-FILM

Replica tape for measuring blasted surface profiles. By placing the Tqc replica tape on the surface and rubbing over it, the Rt (total roughness) or peak-to-valley height of the profile can be taken and then measured with a film thi...

The Paint Inspector s Field Guide

The Inspection of protective coating systems for corrosion control includes a wide range of test methods and techniques. In the Paint Inspector’s Field Guide( PIFG ) a wide range of these inspection methods are covered in an e...

USB measuring microscope - Model 2012

Small, portable, inexpensive and easy microscope that can be connected directly to a PC. Supplied with software for immediate inspection and measuring. The unique optical design combines the advantages of a USB-microscope digital ...

UV INSPECTION SPOTLIGHT

Robust, handheld rechargeable inspection spotlight with a power density at the hot spot of 10,000uW/cm2 and 1500uW/cm2 at 38cm (15") The TQC UV inspection lantern is used to detect contaminations that react under UV-illumination and...

UV POCKET FLASHLIGHT

Small, light weight, UV pocket flashlight powered by an ultra-high output 390-410nm UV LED. This TQC UV pocket flashlight is used to detect contaminations that react under UV-illumination and cannot be seen with naked eye such as s...