Epoxy Mica Intermediate Coating Application Guide

环氧云铁/Glass鳞片Intermediate Coat类 系列 · 完整Application ProcessProcess

product编号: KF-MIO500 Reference standards: ISO 12944-7/8 | SSPC PA1 | GB/T 28699 Version: V2.0 Date: 2026-06-21
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I. Pre-construction Preparation — Substrate Inspection and Treatment

1Substrate Inspection and Handling Standards

Handling Standards:ISO 8501-1 Sa2.5 grade (very thorough blast cleaning)

Roughness requirements:Rz 40-75μm（ISO 8503-1）

Cleanliness requirements:Surface cleanliness grade 2 after blasting (ISO 8502-3), free of oil and dust

Application timing:Apply the primer within 4 hours after sandblasting to prevent rust reoccurrence.

Edge treatment:Grind free edges to a rounded corner with R≥2mm.

Weld treatment:Remove weld slag and spatter from welds; apply stripe coat to welds

2Paint preparation and mixing

Mixing Method:Use an electric stirrer at 300-500 rpm, stir at low speed for 3-5 minutes until uniform.

Mixing ratio:Accurately weigh according to the mixing ratio indicated on the product label

Curing:After mixing, let it stand for 15-30 minutes (23°C) before use

Service life:Pot life after mixing is 4-8 hours (23°C); do not use beyond this period.

3Confirmation of environmental conditions

Application temperature:5-40°C (substrate temperature ≥ dew point +3°C)

Relative humidity:Relative humidity ≤85%

Ventilation requirements:密闭空间强制通风

Weather requirements:Outdoor application should avoid rain/snow/strong winds/direct sunlight

II. Application Process — Selection of Coating Method
Application方法Process/CraftParametersApplicable For场景
Airless Spraying（推荐） Nozzle 0.38-0.53mm, pressure 15-25MPa Large-scale steel structures, storage tanks, pipelines
空气Spraying 喷嘴1.5-2.0mm，压力0.3-0.5MPa Small to medium-sized workpieces, equipment enclosures
Brushing/Roller Coating — Small Area Repair, Weld Pre-coating, Edges and Corners
3. Overcoat Interval and Curing Maintenance

Minimum overcoating interval:Recoatable after reaching surface dry (approximately 4-6 hours at 23°C)

Maximum overcoating interval:If exceeding 7 days, the surface must be roughened (low-pressure sanding at 0.2-0.3 MPa, using non-metallic abrasives).

⚠ Risk of overcoating beyond the time limit:If the maximum recoating interval is exceeded, interlayer adhesion will significantly decrease. The surface must be sweep-blasted (low pressure 0.2-0.3MPa, non-metallic abrasive) to create mechanical anchoring roughness; otherwise, coating delamination may occur.

Curing Conditions:Self-cures at 23°C, fully cures in 7 days. Low temperatures (<5°C) require a low-temperature curing agent.

IV. Safety and Environmental Requirements
⚠ PPE requirements: Respirator (A2P2 filter cartridge) + goggles + nitrile gloves + anti-static workwear + safety shoes
⚠ No Open Flames, Welding, Cutting, or Other Spark-Producing Operations
⚠ Use explosion-proof electrical equipment in the construction area
⚠ Dispose of waste paint and containers according to HW12 category of the National Hazardous Waste List
V. Quality inspection and acceptance standards
Inspection ItemsInspection method验收Standard
Surface preparation grade ISO 8503 Comparison Specimens Sa2.5 grade, Rz 40-75μm
干Film Thickness度(DFT) ISO 2808 Electromagnetic Induction Method 80% of test points ≥ specified value, no test points<80%规定值
Adhesion ISO 4624 Pull-off test / ISO 2409 Cross-cut test ≥3-5MPa / Level 0-1
Pinhole/leak detection High-voltage spark testing No pinholes/leak points
Appearance 目视检查 No sagging/blistering/pinholes/cratering
Basis for Compilation:ISO 12944-7/8 | SSPC PA1 | GB/T 28699 and related industry standards.
Important statement:This construction guide is a recommended reference document. Actual construction parameters should be adjusted based on site conditions, environmental circumstances, and coating system requirements. For special working conditions or construction difficulties, please contact the Kexin New Materials Technical Department for professional support.
Technical support:0757-88793275 | www.psste.com | Shunde District, Foshan City, Guangdong Province

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