engleski

Quality Improvement of Corrosion Protection in the Process of Hot-Dip Galvanizing

Purpose: The process of hot-dip galvanizing in the pipe corrosion protection process is one of the most important processes in the shipbuilding industry. Achieving the optimum thickness of the protective coating contributes to the quality of corrosion protection, reduced costs and have strong impact on customer satisfaction. Approach: The process of hot-dip galvanizing is analyzed as a function of five factors (temperature of molten zinc, the time spent in the melt, the speed of ascent, the dryness condition of basic material surface, the treatment area) using a full 2k factorial design. Findings: The practical implementation of optimisation of hot-dip galvanizing process parameters, on the examples of pipes hot-dip galvanizing at the Shipyards 3. MAJ zinc coating workshop, has been shown. Research limitations/implications: As the experimenting has been conducted in the shipyard, within ongoing production process, the research schedule must have been set in accordance with a production pace. Also, due to character of the production process the data collecting was adopted to the production plan in that particular moment. Practical implications: Excessive thickness of protective zinc coating cause unnecessary costs and customer dissatisfaction. Corrective actions that have been taken based on results of analysis significantly contributed to the level of quality of hot-dip galvanizing. Originality/value: The paper is dealing with a well known statistical method applied at ongoing production process in a way to provide objective and valid conclusions. It was shown that successful application of proposed approach can yield benefits especially in improved quality in hot-dip galvanizing process in shipbuilding and similar industry.

Quality Improvement; Design of Experiments; Parameters of Hot-dip Galvanizing

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