Galvalume Steel Coil, GL Aluzinc Alloy Coated Steel Coil

Product Details

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镀锌钢卷采用热浸镀锌或电镀锌工艺，在其表面涂覆一层保护性锌层，具有优异的耐腐蚀性和更长的使用寿命。适用于对耐候性要求较高的环境。主要应用包括：

建筑结构：轻钢框架、通风管道、电缆桥架。

汽车制造：防腐蚀部件，例如底盘护板、油箱、保险杠。

农业设施：粮仓、温室、畜牧设备。

日常五金：配电箱、仪器柜、电器外壳。

常问问题：

1. 问：镀锌钢卷（GI）的标准交货时间是多久？

A: For regular specifications (e.g., Z20-Z275g/m², commercial quality) with raw material in stock, our standard production lead time is 10-15 days for quantities up to 500 tons. For specific base metal grades (e.g., HSLA structural steel, DDQ deep drawing quality) or non-standard thicknesses that require special hot-rolled feedstock arrangement, the lead time is approximately 20-25 days. We confirm the exact shipping schedule in the Proforma Invoice to align with your project milestones, and expedited handling is available for urgent orders upon request.

2. Q: How do you ensure the zinc coating weight and long-term corrosion resistance?

A: Zinc coating integrity is the core value of galvanized steel. We strictly adhere to ASTM A653 and JIS G3302 standards:

- Coating Weight Control: Through precise air knife pressure adjustment and line speed management, we guarantee the coating weight meets the ordered designation form Z20-Z275g/m². Triple-spot testing is performed on every coil to verify uniform zinc distribution.

- Adhesion Test: We perform Zero Spangle or Minimized Spangle finish to ensure a smooth surface and excellent paint adhesion for subsequent processing. A strict bending test (T-bend) is conducted to ensure the zinc layer does not peel or crack during stamping or roll-forming.

- Substrate Compatibility: We utilize 220°C hot-dip galvanizing process and continuous annealing technology to ensure the zinc-iron alloy layer bonds firmly with the base steel, providing decades of sacrificial protection.

3. Q: What are your accepted payment terms for export orders?

A: We offer flexible payment options to facilitate secure and convenient international trade:

- T/T (Telegraphic Transfer): 30% deposit upon order confirmation, with the remaining 70% balance settled against the scanned copy of the Bill of Lading (B/L).

- L/C (Letter of Credit): We accept Irrevocable L/C at sight. For established long-term partners with solid credit standing, we are also open to negotiating Usance L/C (Deferred Payment L/C) to support your working capital requirements.

4. Q: How do you guarantee the surface quality and prevent "White Rust" during storage and transit?

答：我们在锌块到达您的仓库之前，要实施严格的防腐蚀钝化和涂油处理流程，以保护锌块表面：

- 在线处理：每个线圈均经过权威六价铬的钝化处理（符合RoHS标准），然后均匀地配制防锈油。这可起到保护屏障，有效抵御潮气和酸性大气环境的影响。

- 待海运的包装：我们采用全塑料薄膜包裹，必要时使用VCI（气相腐蚀）袋，将其固定在经过熏蒸的木托盘上，托盘边缘有护角，并有耐用的金属外罩，以防止机械损伤和海水侵入。

- 白锈预防：我们建议客户将线圈存放在干燥通风处，并在到货后3个月内进行处理。详细的储存指南随发货单据提供。

5. 问：如果发现线圈有缺陷或损坏，你们如何处理指控？

答：我们致力于以透明的方式解决问题。如果出现合理的质量问题（例如，厚度不合格、焊点偏差过大或出现分层现象），我们将提供以下补偿：更换缺陷材料、赔偿损失吨位或提供未来订单的抵扣券。

- 拍照程序：请在交货后 30 天内提交相机的照片证据和线圈识别号码。

- 政策文件：有关资格要求和处理时间表的详细概述，请访问我们官方网站的“客户服务/售后”部分，下载“出口产品质量争议解决和投诉政策”PDF。

- 运输风险：我们强烈建议购买货物海运保险，您的货物运输过程中发生损坏。我们将全力协助您准备承运人所需的文件。

6.问：贵公司的标准化生产线在透明包装方面有哪些独特的优势？

答：与纯粹的贸易公司不同，我们拥有自己的综合生产设施。这种垂直整合带来了直接的优势：

1.源头可追溯性：凭借我们自己的冷轧基材供应和连续热浸镀线，我们从始至终控制锌化学成分（铝含量）和炉内气氛，确保一致的成分力，并消除纺织加工中常见的“裸露点”或“接受剥落”的风险。

2.交货周期：冷轧和无缝之间的无缝衔接消除了高效的外部物流间歇，使我们的生产计划更加可靠，能够更好地响应大批量需求。

3.成本效率：通过内部管理整个制造链，我们消除了第三方加工加价，从而能够为同等重量和等级的产品提供具有竞争力的EXW/FOB价格。