Understanding Surface Profile - Elcometer скачать в хорошем качестве

Understanding Surface Profile - Elcometer

PLEASE NOTE: This video is part of "Understanding Surface Profile with the Elcometer 224 Digital Surface Profile Gauge". Watch the full video here:    • Understanding Surface Profile with the Elc...   In the coatings industry, what is surface profile, why is it important, and what surface profile is required to ensure the coating performs for its expected lifetime? This video answers all of these questions, and more... CONTENTS 0:04 - What is surface profile? 1:32 - Surface profile vs. roughness 2:01 - Why does the coatings industry measure surface profile? 2:58 - What surface profile is required? In the industrial and protective coatings industry, metal surfaces are blasted not only to remove corrosion or old coatings, but to generate a surface profile prior to re-painting. In some industries a surface profile is achieved through chemical etching or mechanical abrasion. But, regardless of the method, the surface profile increases the surface area of the metal - and it is this increased surface area which provides a key for the coating to adhere or stick to. Surface profile is a measurement of the peak-to-valley height, but why is it important for the coatings industry to measure it? To avoid corrosion. Corrosion is typically caused when three things come together – a ferrous material (in our case the steel substrate – although it is worth noting that non-ferrous materials can also corrode), oxygen (from the air) and moisture. If you can remove just one of the 3 elements, corrosion (or more precisely aerobic corrosion) simply cannot happen. Applying a coating to the steel provides a barrier between the steel and both the air and moisture, preventing corrosion. So if the coating is damaged, or simply rolls off the surface due to poor adhesion, then the steel will rust, corrode, and in time weaken the structure. Watch our other surface profile videos: Surface Comparators:    • How to use a Surface Comparator   Replica Tape & Elcometer 124:    • Measuring Surface Profile using the Elcome...   Elcometer 224 Digital Surface Profile Gauge:    • How to Measure Surface Profile using the E...   For more information on the Elcometer range of surface profile gauges, surface comparators, and replica tape, please contact Elcometer at sales@elcometer.com, or visit our website: https://www.elcometer.com/en/coating-... ----- Click here to download the video script in English: https://www.elcometer.com/pub/media/P... ----- STANDARDS: (relating to surface profile measurement) AS 3894.5, ASTM D 4417-A, ASTM D 4417-B, ASTM D 4417-C, BS 7079-C5, IMO MSC.215(82), IMO MSC.244(83), ISO 8503-1, ISO 8503-2, ISO 8503-5, NACE RP0287, SANS 5772, SSPC PA 17, US Navy NSI 009-32, US Navy PPI 63101-000