The personage of stone material profession should have deep experience to the phenomenon of stone material spit yellow,rust spot and straw rope mark,to solve this kind of problem,first we should make clear the reason of stone material spit yellow and rust spot phenomenon.
1.Rust spots caused by the rust of anchoring reinforcement.
2.Stone products are bundled and packed with straw ropes,which are exposed to water or moisture,stored for a long time or transported for a long distance,easily causing color changes of stone materials.
3 stone wet hanging installation,cement mortar in solidification process,through stone wool stoma will the pigment in the sand pulp discharge stone surface,form color spot,especially light or white stone(such as jazz white,Yashi white,Spanish cream-colored)the most easy to appear this phenomenon.
4.The raw material of stone material contains high iron content(such as American white hemp),carbon dioxide and water in the air invade the surface of stone material,react with the iron inside stone material to form iron dioxide,and discharge through the wool stoma of stone material,forming yellow spot.
5.In the process of sawing,the surface of stone remains iron filings.If the stone is not washed clean by water,it will be deposited for a long time and form rust.
The methods of removing the above phenomenon can be divided into physical and chemical removal.
Remove the yellow spots with a polishing abrasive.But this method is more suitable for the flat stone material that has not been installed,for the stone material that has been installed or special-shaped stone material meaning is not big,and cost labor cost material.
It is known that the chief component of rust is a mixture of iron hydroxide and iron hydroxide.So as long as the materials and methods are correct,chemical removal is the most convenient and economical.The traditional chemical cleaning agent mainly has two kinds,namely by the hydrochloric acid,the corrosion inhibitor,the acid fog to raise the preparation,the activator and so on preparation hydrochloric acid rust remover and oxalic acid rust remover(oxalic acid preparation of saturated solution).The advantage of these two kinds is clean fast,cost is low,but after treatment if did not flush in time with water or wash not thoroughly,often contrary to one's desire,not treated yellowing,treated place instead of"old disease relapse",serious will destroy the glossiness of stone material.