XINXIN PENGYUAN METAL MATERIAL CO., LTD.

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010 steel coil Black steel coil S235JR steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN

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We have state-of-the-art equipment. Our products are exported for the USA, the UK and so on, enjoying a fantastic status among the clients for Alloy Plate, Stainless Steel Pipe 316L, 4340 Steel Plate, Seeing believes! We sincerely welcome the new clients abroad to build organization associations and also hope to consolidate the associations while using the long-established prospects.
Best Quality Cold Rolled Galvanized Steel Coil - SAE1010 steel coil Black steel coil S235JR steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN Detail:

Defects mainly include: falling off, scratches, passivation spots, zinc particles, thick edges, air knife stripes, air knife scratches, exposed steel, inclusions, mechanical damage, poor performance of steel base, wavy edges, ladles, improper size, embossing, improper thickness of zinc layer, roller printing, etc.

The main reasons for zinc layer falling off are: surface oxidation, silicon compounds, too dirty cold rolling emulsion, too high oxidation atmosphere in NOF section and dew point of protective gas, unreasonable air-fuel ratio, low hydrogen flow, oxygen infiltration in the furnace, low temperature of strip steel entering the pot, low furnace pressure in RWP section and air suction in furnace door, low furnace temperature in NOF section, endless oil evaporation, low aluminum content in zinc pot, too fast unit speed, insufficient reduction, too short residence time in zinc liquid The coating is too thick.

The causes of white rust and black spots are: black spots are formed by the further oxidation of white rust.

The main causes of white rust are:

(1) Poor passivation, insufficient or uneven passivation film thickness;

(2) The surface is not oiled or there is residual water on the surface of the strip steel;

(3) There is moisture on the surface of strip steel during coiling;

(4) Passivation is not completely dried;

(5) Damp or rain during transportation or storage;

(6) The storage time of finished products is too long;

(7) The galvanized sheet is in contact with or stored with other corrosive media such as acid and alkali.

The finished products can be stored in the warehouse for up to three months to avoid oxidation.

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Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures

Best Quality Cold Rolled Galvanized Steel Coil - SAE1010  steel coil Black  steel coil S235JR  steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN detail pictures


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Our goal is to provide high quality products at competitive prices, and whole heartedly service to customers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for Best Quality Cold Rolled Galvanized Steel Coil - SAE1010 steel coil Black steel coil S235JR steel coilSummary of Theoretical Knowledge of Galvanized Coil – XINXIN PENGYUAN , The product will supply to all over the world, such as: Nepal, Malta, Dubai, We strive for excellence, constant improvement and innovation, is committed to make us the "customer trust" and the "first choice of engineering machinery accessories brand" suppliers. Choose us, sharing a win-win situation!
  • The goods are very perfect and the company sales manager is warmful, we will come to this company to purchase next time.
    5 Stars By mary rash from Madras - 2017.02.18 15:54
    Although we are a small company, we are also respected. Reliable quality, sincere service and good credit, we are honored to be able to work with you!
    5 Stars By Rose from Philadelphia - 2018.09.23 18:44
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