CORRODERE
Thermal Metal Spraying
What is Thermal Metal Spraying ?
Thermal spraying is a surface coating process that sprays metals , ceramics , and polymers onto the surface of another material .
Thermal metal spraying has long been used in the protective coating industry particularly in the oil and gas sector . Our course has been specifically developed to assist in understanding types of thermal metal spray and improve the hand skills of Applicators .
It ’ s widely used to provide corrosion protection to ferrous metals , as well as to change the item ’ s surface properties , for instance , to improve the wear resistance or thermal conductivity .
Corrosion and wear are a major problem for a long list of industries , so many use a metal spraying process , including :
Offshore Oil and gas Marine Tube , pipe , and general fabrication Petrochemical Construction Water supply Sewerage Ship building Aerospace Airside support
Thermal spraying protects and extends the life of structures , equipment and vessels in many hostile environments and situations , where protective surface coatings are vital for longevity . Many will not require their first maintenance of the coating before 20 years ’ service , even in harsh environments . This leads to significant maintenance cost reductions .
How does metal spraying work ?
Thermal spraying for corrosion control is usually carried out by Flame and Arc spray – they are the least costly and quickest to implement , so are suitable for corrosion protection of larger structures . Plasma and HVOF sprays are used to apply engineering coatings and are of higher quality , density , and bond strength .
Sprayed metal should be applied using the oxygen / fuel gas process or electric arc process . The sprayed metal coating should be continuously applied to each 0.5 m2 of the run or the area of the component , whichever is the lesser , until the specified thickness has been achieved .
The application of sprayed metal coatings should only be carried out by a specialist Contractor who has skilled and accredited personnel to ISO 14918:2018 Thermal spraying Qualification testing of thermal sprayers . To attain this level of accreditation , we have a training provider who can offer a range of training options , and support users with all their material and consumable requirements .
Inspection personnel for thermal metal spraying should also be qualified as a Thermal Metal Spraying Inspector provided by The Thermal Spraying and Surface Engineering Association ( TSSEA ) or equivalent .
Benefits of Thermal Metal Spraying
Metal spraying offers several benefits , including :
Increased durability Modified electrical properties Increased or decreased corrosion protection Increased hardness Increased or decreased friction Increased wear resistance Additional protection to damaged materials
In conclusion , one of the main reasons why this technique is so popular and widely utilised , is the deposition rate of the surface is faster and easier than any other coating processes .
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12 NOVEMBER 2021 read online : www . surfaceworld . com