1、 鍍銅色澤評定
1. Evaluation of copper plating color and lustre
由于我國暫無鍍銅色澤的統(tǒng)一評判標準，采用評分制來表征鍍銅色澤。鍍銅定徑拉拔后，將室外自然光和室內(nèi)顯微鏡下的觀察相結(jié)合，對鍍銅色澤分6個級別。
Due to the fact that there is no uniform evaluation standard of copper color in China, the scoring system is used to characterize the color of copper plating. After copper plating and sizing, the combination of outdoor natural light and indoor microscope observation can be divided into 6 levels.
0級：未發(fā)生置換反應(yīng)，焊絲表面呈黑色或發(fā)白亮金屬光澤，鏡下可見鐵基體或鍍層破碎，覆蓋率不足50％。
Grade 0: no replacement reaction occurs. The surface of the welding wire is black or white bright metallic luster. Under the microscope, the iron matrix or coating is broken, and the coverage rate is less than 50%.
1級：鍍層呈暗褐色或略顯銅色，鏡下顯示鍍層基本完好，鍍層覆蓋率80％左右。
Grade 1: the coating is dark brown or slightly copper colored. Under the microscope, the coating is basically intact, and the plating coverage rate is about 80%.
2級：鍍層呈亮黃色，但顏色發(fā)白，鏡下顯示鍍層均勻、完好。屬于焊絲化鍍合格。
Grade 2: the coating is bright yellow, but the color is white. Under the microscope, the coating is uniform and intact. It is qualified for welding wire plating.
3級：鍍層呈金黃色，鏡下顯示鍍層均勻、致密，屬化鍍良好狀態(tài)。
Grade 3: the coating is golden yellow. Under the microscope, the coating is uniform and dense.
4級：鍍層金黃略帶粉紅色，鏡下顯示鍍層均勻、細膩，屬鍍層優(yōu)良狀態(tài)。
Grade 4: the coating is golden and pinkish pink. Under the microscope, the coating is uniform and delicate, which is a good coating state.
5級：鍍層近粉紅色，優(yōu)于4級。
Level 5: the coating is near pink, superior to grade 4.
2、鍍層結(jié)合力判定
2. Determination of the binding force of the coating
考慮到焊絲在使用過程中會與焊槍導(dǎo)電嘴摩擦，因此需對鍍銅焊絲的鍍層結(jié)合力進行評判。
Considering that the welding wire will be rubbed with the nozzle of the welding torch during the use, it is necessary to evaluate the bonding force of the copper plating wire.
結(jié)合力評判：把待測試成品焊絲彎成角度相同的曲線，在同樣的紙上反復(fù)摩擦相同次數(shù)后觀測鍍銅焊絲。
Combining force evaluation: the finished product welded wire is bent into the same angle curve, and the same time after repeated friction on the same paper, the copper plating wire is observed.
1級：彎曲處銅層全部剝落；
1 level: the copper layer in the bend is all peeled off;
2級：銅層較大量剝落，呈橢圓形；
Level 2: the copper layer is a large number of flaking and elliptical.
3級：銅層有少量剝落，呈圓點狀，暴露少量焊絲鐵基體；
Grade 3: the copper layer has a small amount of spalling, showing a round dot, exposing a small amount of iron substrate.
4級：銅層基本未剝落，鐵絲基體基本無暴露；
Grade 4: the copper layer is basically not spalling, and the iron wire matrix is basically unexposed.
5級：銅層完全未剝落，且銅層覆蓋良好，鐵絲基體完全未暴露。
Grade 5: the copper layer is not spalling completely, and the copper layer is well covered, and the iron wire matrix is completely unexposed.
3、脫銅的判定標準
3. Determination of decopper
鍍銅焊絲以自身為芯棒進行自纏繞，纏繞后由于外側(cè)延伸增大，如果鍍銅結(jié)合力不好，會造成鍍銅層開裂、脫銅。
The copper plating wire is self winding with its own mandrel. After winding, due to the increase of the lateral extension, if the copper bonding force is not good, the copper coating will be cracked and copper removed.
結(jié)果評判：當以自身為芯棒進行自纏繞時，緊密纏繞5匝以上后，在50倍顯微鏡下觀察，如果纏繞后焊絲外側(cè)部分裂紋、起鱗超過50%或者在脫脂棉棒擦拭后看到脫落的銅皮則判定為脫銅。反之，裂紋、起鱗不超過50%且脫脂棉擦拭后未見脫落銅皮，則判定為不脫銅。
The results are as follows: when self winding is self winding, it is tightly wound over 5 turns and is observed under 50 times of microscope. If the outer part of the welding wire is wound, the scale is more than 50% or the skimmed cotton rod is wiped, the peeling copper skin is judged to be decopper. On the contrary, the cracks and scales do not exceed 50% and no copper peel is removed after the cotton is polished.
4、防銹性能判定
4, determination of antirust property
將待評測焊絲懸掛在裝有60℃溫水的燒杯上方，靜置15min后將焊絲取下，觀察2mm長焊絲一周表面上的銹蝕坑平均值作為評判標準。
The welding wire is suspended above the beaker with warm water at 60 degrees centigrade. After 15min, the welding wire is removed and the average value of the corrosion pits on the surface of the 2mm long wire for one week is observed as a criterion.