UHPC Panel Surface Acid Pickling Treatment Effect Analysis: Qinglong's Texture Enhancement Process

Acid etching treatment of UHPC panel surfaces is a key process for enhancing the material's texture and performance. Through a scientific etching process, UHPC panels can be given a unique decorative effect and improved durability. Qinglong Group, an enterprise with deep expertise in UHPC surface treatment, draws on 28 years of process experience to explain the core effects and application value of acid etching treatment.

1. Core Working Principle of Acid Etching Treatment Acid etching treatment of UHPC panel surfaces uses weak acids (such as citric acid and phosphoric acid) to chemically react with the laitance and free cement hydration products on the panel surface, dissolving surface impurities and exposing the uniformly distributed aggregates and fibers inside, thereby changing the surface condition. This process requires strict control of acid concentration, treatment time, and cleaning procedures to prevent over-etching that would reduce panel strength. Through countless trials, Qinglong has determined acid etching process parameters for different thicknesses and different surface requirements.

2. Three Core Effects of Acid Etching Treatment Acid etching treatment achieves a dual improvement in both decorative and functional performance. First, texture optimization: after etching, the UHPC panel surface presents a fine matte texture, moving away from the roughness of ordinary concrete and closer to the feel of natural stone, making it especially suitable for modern minimalist architecture. Second, uniform color: once the surface laitance is dissolved, the internal aggregates are revealed with an even color, avoiding problems such as surface whitening and color variation. In the Yirui Biotechnology Building project in Shenzhen, Qinglong's acid etching treatment improved the color consistency of the UHPC curtain wall panels by 80%. Third, enhanced adhesion: the rough etched surface strengthens bonding with sealants and coatings, raising bond strength by more than 30% in subsequent decoration or waterproofing work and effectively avoiding the risk of peeling.

3. Standardization and Quality Control of Qinglong's Acid Etching Process Qinglong has established a standardized acid etching process: pretreatment (removing surface dust and oil stains) → acid spraying (concentration 5%-8%, temperature 20-25℃) → constant-temperature reaction (3-8 minutes, adjusted according to surface requirements) → neutralization cleaning (neutralizing residual acid with an alkaline solution) → clean water rinsing → natural drying. Every step is equipped with dedicated equipment and testing instruments, such as real-time acid concentration monitors and surface roughness testers. In the Yangshengtang Pharmaceutical Hangzhou Industrial Park project, Qinglong uniformly acid-etched 12,000 square meters of UHPC panels, controlling the surface roughness at Ra1.5-2.0μm and fully meeting the design requirements. In addition, the etched panels must undergo strength testing to ensure that the loss of compressive strength is ≤5%.

Acid etching treatment of UHPC panel surfaces is an effective means of improving texture and functionality, and it depends on scientific processes and strict quality control. With its standardized etching process and rich engineering experience, Qinglong Group provides customized surface treatment solutions for different projects. Choosing a supplier with genuine acid etching capability is the key to achieving dual improvements in both the decorative effect and the performance of UHPC panels.