Steel pretreatment and hot-dip galvanizing

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Steel blasting and hot-dip zinc

The first method of pretreating steel and hot-dip galvanizing the material is by blasting.

Spray phosphating

The second method of pretreatment of steel and hot-dip galvanizing of material is spray phosphating in an automatic degreasing box /so called auto wash/. The internal dimensions of the box are: (6 × 1.6 × 0.6m) = (l × h × w) The automatic degreasing box has the following technological operations (procedure):

1. The first operation is degreasing and phosphating with ferric phosphate.
2. The second operation is rinsing with utility water.
3. The third operation is rinsing with demi-water.
4. The fourth operation is drying the materials in a dryer.

Phosphating high pressure apparatus

The third method of steel pretreatment and hot-dip galvanizing of the material is phosphating with a high-pressure machine in a manual degreasing box /so-called WAPKA/. The manual degreasing box has the following technological operations (procedure):

1. The first operation is degreasing and phosphating by spraying with ferric phosphate.
2. The second operation involves rinsing by spraying with utility water.
3. The last operation is drying the materials in a dryer.

Every pretreatment has its quality and every quality has its price!