4.1 钢丝镀锌层的试验项目、试验方法和取样要求按表6的规定进行。
表6钢丝镀锌层的试验项目、试验方法和取样要求
序号 | 试验项目 | 试验方法 | 取样部位 |
1 | 锌层重量 | GB/T 2973 | 任一端 |
2 | 硫酸铜试验 | GB/T 2972 | 任一端 |
3 | 缠绕试验 | GB/T 2976 | 任一端 |
4 | 表面质量 | 肉眼检查 | 任一部位 |
4.2 进行规定试验截取试样时，若钢丝端头有明显损伤，应截去损伤部分钢丝后再取试样。
5 检验规则
钢丝镀锌层的质量检查与验收按相应产品标准的规定执行。
附 录 A
(资料性附录)
硫酸铜试验浸置次数
钢丝直径， mm | 硫酸铜试验(浸置次数) 不小于 | |||||||||||||||
A | AB | B | C | D | E | F | ||||||||||
A2 | A2 | |||||||||||||||
60S | 30S | 60S | 30S | 60S | 30S | 60S | 30S | 60S | 30S | 60S | 30S | 60S | 30S | 60S | 30S | |
≤0.25 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
>0.25~0.40 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
>0.40~0.50 | 1 | 1 | 1 | - | - | 1 | - | - | - | - | - | - | - | - | - | - |
>0.50~0.60 | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - | - | - | - | - |
>0.60~0.80 | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - | - | - | - | - |
>0.80~1.00 | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | - | - | - | - | - |
>1.00~1.20 | 2 | - | 2 | - | 1 | 1 | 1 | - | - | 1 | - | - | - | - | - | - |
>1.20~1.40 | 2 | - | 2 | - | 1 | 1 | 1 | - | - | 1 | - | - | - | - | - | - |
>1.40~1.60 | 2 | 1 | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - |
>1.60~1.80 | 2 | 1 | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - |
>1.80~2.00 | 2 | 1 | 2 | - | 2 | - | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - |
>2.00~2.20 | 2 | 1 | 2 | - | 2 | - | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - |
>2.20~2.50 | 3 | - | 2 | - | 2 | - | 1 | 1 | 1 | - | - | 1 | - | 1 | - | - |
>2.50~2.80 | 3 | - | 2 | - | 2 | - | 1 | 1 | 1 | 1 | - | 1 | - | 1 | - | 1 |
>2.80~3.00 | 3 | - | 2 | 1 | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 |
>3.00~3.20 | 3 | - | 2 | 1 | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 |
>3.20~3.60 | 3 | - | 3 | - | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 | - | 1 |
>3.60~4.00 | 3 | 1 | 3 | - | 2 | - | 1 | 1 | 1 | 1 | 1 | 1 | - | 1 | - | 1 |
>4.00~4.40 | 3 | 1 | 3 | - | 2 | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | 1 |
>4.40~5.20 | 3 | 1 | 3 | - | 3 | - | 2 | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 |
>5.20~6.00 | 3 | 1 | 3 | - | 3 | - | - | - | 1 | 1 | 1 | 1 | 1 | - | - | 1 |
>6.00~7.50 | 3 | 1 | 3 | 1 | - | - | - | - | - | - | - | - | - | - | - | - |
>7.50~10.00 | 4 | - | 4 | - | - | - | - | - | - | - | - | - | - | - | - | - |
