surface cleanliness - salt contamination

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Surface contamination from salts such as chlorides, sulphates and nitrates have been shown to lead to blistering of organic coatings, particularly in immersion conditions.

It is not sufficient, however to only measure the cleanliness of the substrate. In a multi-layer coating process, it is necessary to monitor and record the cleanliness of each layer prior to applying the next coating.

When using amine cured epoxy coatings, for example, in low ambient temperatures or in high humidity, a surface oiliness or exudate may cause inter-coating adhesion failure.

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Elcometer 142 ISO 8502-3 Dust Tape Test Kit

The Elcometer 142 ISO 8502-3 Dust Tape Test kit 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 failure and sub-standard coating finish. The kit can be used in accordance with the recommendations of BS EN ISO 8502-3 either as a pass/fail test or as a permanent record of the presence of dust.

 

Elcometer 130 SCM400 Salt Contamination Meter

This very easy to use salt contamination meter measures the level of salts on the surface. Soluble salts on a surface are absorbed into a special filter paper soaked with distilled water. The Elcometer 130 measures the conductivity of the wet paper, calculates the salt level and displays it in ug/cm˛.

 

Elcometer 135A Bresle Sampler

Supplied with the Elcometer 138/2 Surface Contamination Kit, the Elcometer 135A is a self-adhesive rubber film patch with a sealed compartment used for taking samples of soluble impurities on a test surface.

 

Elcometer 135B Bresle Patch

Supplied with the Elcometer 138 Bresle Salt Kit, the Elcometer 135B is a self-adhesive rubber film patch with a sealed compartment used for taking samples of soluble impurities on a test surface.

 

Elcometer 138/2 Surface Contamination Kit

Measuring the level of contaminants on a surface prior to application of the coating is essential to ensure the quality of the coating and that its optimum lifetime is achieved. If the coating is applied to a contaminated surface, which is not properly prepared, it could fail prematurely resulting in costly re-coating and high maintenance costs.

 

Elcometer 138 Bresle Kit & Elcometer 135 Bresle Patches

Well known in the protective coatings field, the Bresle Patch is one of the most popular tests for soluable salts. A patch is adhered to the substrate and the soluable salts are dissolved into distilled water using a rinsing motion caused by a syringe. A conductivity meter is then used to calculate the slat level.

 

Elcometer 134 CSN – Chlorides, Sulphates & Nitrates

Designed to accurately measure surface chloride, sulphate and nitrate ions in minutes, the Elcometer 134 ‘CSN Salts’ offers the user the ability of trouble-free testing in the field. Supplied in an ABS plastic carrying case for easy portability around the site, each field kit is supplied with full instructions attached to the inside lid.

 

Elcometer 134A Chloride Ion Test Kit for Abrasives

Chlorides deposited on a surface by contaminated abrasive during blasting can cause a coating to fail prematurely. Contamination can build up, particularly if the blast media is recycled several times. The Elcometer 134A is an easy to use, accurate field test which determines if your abrasive is contaminated with chlorides and thus prevent costly surface-related failures.

 

Elcometer 134S Chloride Detection Kit for Blast Cleaned Surfaces

Chloride salts left on the surface before the first coat is applied can result in the coating system being forced off the surface by corrosion or blistering before the full life of the coating has been reached. Salts are extracted using a rubber tube and the level of chloride on the surface is identified using a simple glass tube which identifies the concentration level.

 

Elcometer 134W Chloride Ion Test Kit for Water/Liquids

Coatings can fail due to chlorides being deposited on a surface by contaminated water during pressure washing, UHP water jetting or wet abrasive blasting. The Elcometer 134W is an easy to use, accurate, field based test which determines if your wash water is contaminated with chlorides and thus prevent costly surface coating failures.

 

Elcometer 128 Pictorial Surface Standards

Elcometer’s range of Surface Standards, covers most of those required for surface cleanliness. They include: The swedish standard, the british standard and the sspc standards vis 1 and vis 3.

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