Minimising zinc over-coating

Burnett said that when considering the rising price of zinc, hot dip galvanising line owners and managers rely upon online coating weight gauges and auto-control algorithms to minimise zinc over-coating when transitioning products. Among other things continuous hot-dip galvanising is an efficient me...

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Bibliographic Details
Published inSteel times international Vol. 41; no. 1; pp. 33 - 36
Main Author Burnett, Christopher
Format Journal Article
LanguageEnglish
Published Redhill Quartz Business Media Ltd 01.01.2017
Subjects
Coils
Cold
Consumption
Control algorithms
Cooling
Cost control
Datasets
Economic impact
Flow control
Fuel consumption
Gamma rays
Gauges
Hot dip galvanizing
Hot dipping
Immersion coating
Knives
Protective coatings
Quality
Segments
Sensors
Software
Strip steel
X-rays
Zinc base alloys
Zinc coatings
Online AccessGet full text
ISSN0143-7798

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Summary:Burnett said that when considering the rising price of zinc, hot dip galvanising line owners and managers rely upon online coating weight gauges and auto-control algorithms to minimise zinc over-coating when transitioning products. Among other things continuous hot-dip galvanising is an efficient method of coating large amounts of steel strip with a zinc layer. The process begins by heating up the steel and passing it through a bath of molten liquid zinc or zinc alloy. Depending on the sheet width, production volume, and coating type, a typical HDGL can consume over $25 million per year. The highest quality products are those with a uniform coating weight and no undercoated strip segments. Since coated coils are purchased based on a target coating weight, coils with any undercoated segments, even a few grams per square metre, are treated as defective goods. They cannot be sold as specified and result in economic losses.
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ISSN:0143-7798