What Protection Does GRC Exterior Wall Need in Acid Rain Areas?

Acid-rain corrosion erodes GRC (Glass Reinforced Concrete) surfaces over time, causing dusting, strength loss, and anchorage corrosion — a common pain point for projects sited in acid-rain regions.

1. Raw-material formulation from the source

Acid-rain resistance starts in the mix design. Optimize acid-resistant mineral admixtures, control alkali-resistant glass fiber content and dispersion uniformity, and comply with JGJ/T423-2018 — the national GRC building application standard — to cut acid-erosion risk at the source.

2. Dedicated surface-protection coating system

Apply an acid-resistant sealing primer plus a weather-resistant topcoat to seal internal pores, block acid-water penetration, and prevent acid–alkali neutralization inside the GRC body. Choose coatings with strong adhesion and long-term aging resistance to avoid premature delamination.

3. Anchorage and joint detail for harsh conditions

Use 316 or higher-grade acid-resistant steel for anchorage nodes. Seal all joints with acid-resistant sealant to prevent water ingress. As a contributor to multiple GRC industry standards, Qinglong GRC delivers integrated design, production, installation and after-sales service tailored to acid-rain conditions.

About Qinglong GRC — Guangdong Qinglong Construction Engineering Co., Ltd. Founded 1997 (28 years). 50+ patents. Integrated R&D, design, production, sales and construction. Contact: Mr. Song, +86 139 0259 7531. Address: 302 Card, No. 22 Dongming Road, Shiqi District, Zhongshan City.