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铬酸盐处理 规格表
Chromate KS Specifications — 4个尺寸
ISO 4520
ISOChromate
4 sizes| Grade | Thickness (μm) | Hardness (HV) | Corrosion (SST h) | Color | Note |
|---|---|---|---|---|---|
| 0.1~0.3 | - | 48 | ~ | 3 RoHS | |
| 0.1~0.3 | - | 72 | 零件 | ||
| 0.3~0.5 | - | 96 | 个 | 6 , RoHS | |
| 黑色 | 0.3~0.5 | - | 96 | 黑色 | · |
This specification follows ISO (International Organization for Standardization) standards. ISO ensures cross-border compatibility, making it ideal for multinational projects, export equipment design, and global parts procurement.
铬酸盐处理在镀锌后形成铬酸盐转化膜，提升耐腐蚀性并决定外观色泽。根据RoHS，六价铬(黄色、黑色)受限，三价铬(白色、蓝色)为主流。膜厚0.1-0.5μm很薄，可额外提供48-96小时SST耐腐蚀性。外观色彩(彩虹、蓝、黑)实现零件识别与装饰性兼顾。