Possible casting defects related to insufficient paint testing

1. Vein pattern

2. Unqualified size

3. Gas defects

4. Trachoma

5. Inclusion of slag

6. Drip mark

7. Dehydration shrinkage

8. Rough surface of castings

Each defect directly affects the profitability of the foundry as it incurs additional costs related to labor, maintenance, machining rework, and even scrap. In addition, the true source of these defects is difficult to identify, sometimes even unrecognizable, or confused with other possible defect sources.

The surface veins of castings are an example. Grain size and its distribution, compaction degree, pouring temperature, material type, and coating characteristics are only some of the active variables that cause these common defects.

The use of high-quality coatings is an effective way to cover, reduce, and even solve problems related to casting defects.

An advertisement says, "Power is nothing without control"

Even high-precision coatings need to operate under their constant and predictable conditions, otherwise the coating itself becomes a possible source of these defects.