UNDER-FILM CORROSION IN STEEL STRUCTURE - THE SILENT DESTROYER BENEATH PROTECTIVE COATINGS
-
27/01/2026
In the steel structure industry, many believe that a visually flawless paint coating is enough to ensure proper steel protection.
In reality, under-film corrosion is a serious and often overlooked threat. It develops beneath the coating, silently attacking the steel while the surface still appears intact.
Key Causes
- Bề mặt thép làm sạch không đạt chuẩn (Sa 2.0–Sa 2.5), còn dầu mỡ, bụi bẩn
- Thi công sơn khi độ ẩm cao, bề mặt không đảm bảo chênh lệch điểm sương
- Thép “hở mặt” quá lâu sau phun bi/phun cát, hình thành lớp rỉ mỏng khó quan sát
- Sử dụng hệ sơn không phù hợp với môi trường làm việc

Rỉ âm trong kết cấu thép - "Kẻ phá hoại thầm lặng" dưới lớp sơn bảo vệ
Nguy hiểm của rỉ âm
- Bên ngoài không thấy dấu hiệu bất thường
- Bên trong, rỉ sét phát triển, làm mất liên kết giữa sơn và thép
- Khi sơn bắt đầu phồng rộp hoặc bong tróc, mức độ ăn mòn thường đã rất nghiêm trọng
Cách phòng ngừa
- Làm sạch bề mặt đạt tiêu chuẩn kỹ thuật
- Kiểm soát nghiêm ngặt độ ẩm & điểm sương khi thi công
- Lựa chọn hệ sơn chống ăn mòn phù hợp với môi trường sử dụng
- Tuân thủ đúng thời gian giữa các lớp sơn
Seico - Chuẩn chất thép - Trọn niềm tin
-------------------
SEICO STEEL
Website: http://seico.vn
Email: hnsales@seico.vn
YouTube: www.youtube.com/@SEICOJSC
LinkedIn: SEICO JSC trên LinkedIn
ข่าวที่เกี่ยวข้อง

- 02
- Jun
SEICO Receives Positive Customer Evaluation Letter from Duc Thinh New Material Technology Co., Ltd.
- 02/06/2026
Customer satisfaction has always been the most important measure of SEICO’s service quality and project execution capability. Recently, SEICO was honored to receive an evaluation letter from Duc Thinh New Material Technology Co., Ltd., recognizing the efforts and achievements delivered by the SEICO team throughout the project implementation process.

- 26
- May
- 26/05/2026
In steel structures factory, the biggest challenge for floor systems is not only load-bearing capacity, but also vibration stability, long-span capability, and construction optimization. This is exactly why SP Deck technology was developed — representing a major advancement beyond traditional deck slab systems.

- 23
- May
SEICO x YOKOREI: Steel Structure Solutions Meeting Cold Storage Industry Standards
- 23/05/2026
The cold storage industry requires steel structures to meet highly demanding technical standards to ensure stable and long-term operation under extreme environmental conditions. Beyond load-bearing performance, steel structures must provide excellent corrosion resistance and structural stability in low-temperature, high-humidity environments with continuous operation.

- 15
- May
AURORA IP WASTEWATER TREATMENT PLANT: OPTIMIZING OPERATIONS WITH A COMPREHENSIVE SOLUTION FROM SEICO
- 15/05/2026
The Wastewater Treatment Plant project at the Rang Dong Textile Industrial Park – Aurora IP has been planned with a total treatment capacity of up to 110,000 m³ per day, developed through multiple modern treatment modules to meet sustainable operational demands and increasingly strict environmental standards.

- 14
- May
CASE STUDY: REDUCING TOTAL STEEL STRUCTURE WEIGHT BY 20% THROUGH DESIGN OPTIMIZATION
- 14/05/2026
In high-tech agricultural projects, the challenge is not only about “designing a structure that is safe enough,” but also about optimizing investment costs, construction efficiency, and long-term operational performance.
(7).png)
- 08
- May
SEICO x Core5 Hai Phong – Phase 2 at Nam Dinh Vu Industrial Park
- 08/05/2026
Progress update on the structural steel package at the Core5 Hai Phong project – one of the modern, sustainability-oriented industrial developments at Nam Dinh Vu Industrial Park.

- 30
- Apr
Molex Project - Seico's mark in the high-tech industry
- 30/04/2026
Seico is proud to partner with the Molex Project—part of Koch Industries—through Molex Vietnam. This is a flagship project in the high-tech sector, focusing on the production of high-speed connectivity cables, multi-core cables, and fiber optic modules

- 27
- Apr
Concordia International School – A Mark of SEICO’s Steel Structure Solutions
- 27/04/2026
Concordia International School Hanoi, recognized as one of the most prestigious international educational institutions in Hanoi, stands as a representative project showcasing SEICO’s capabilities in delivering complex steel structure solutions that require advanced technical expertise and precise coordination among all stakeholders.
Vietnam
English
Japan
Korea
China
Indonesia
Thailand